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Costa CMM, Santos DS, Opretzka LCF, de Assis Silva GS, Santos GC, Evangelista AF, Soares MBP, Villarreal CF. Different mechanisms guide the antinociceptive effect of bone marrow-mononuclear cells and bone marrow-mesenchymal stem/stromal cells in trigeminal neuralgia. Life Sci 2024; 354:122944. [PMID: 39111567 DOI: 10.1016/j.lfs.2024.122944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2024] [Revised: 07/21/2024] [Accepted: 08/04/2024] [Indexed: 08/10/2024]
Abstract
AIMS Trigeminal neuralgia (TN) is a type of chronic orofacial pain evoked by trivial stimuli that manifests as episodes of excruciating and sudden, recurrent paroxysmal pain. Most patients are refractory to pharmacological therapy used for the treatment of TN. Mononuclear cells (MNC) and mesenchymal stem/stromal cells (MSC) have shown therapeutic potential in painful neuropathies, but their mechanism of action is not fully understood. The present work aimed to investigate the antinociceptive effect and mechanism of action of MNC and MSC in experimental TN. MATERIALS AND METHODS Mice submitted to the chronic constriction injury of the infraorbital nerve (CCI-ION) mouse model of TN received a single intravenous injection of saline, MNC, or MSC (1 × 106 cells/mouse). The effect of the treatments on the behavioral signs of painful neuropathy, morphological aspects of the infraorbital nerve, and inflammatory and oxidative stress markers in the infraorbital nerve were assessed. KEY FINDINGS MNC and MSC improved behavioral painful neuropathy, activated key cell signaling antioxidant pathways by increasing Nrf2 expression, and reduced the proinflammatory cytokines IL-1β and TNF-α. However, treatment with MSC, but not MNC, was associated with a sustained increase of IL-10 and with the re-establishment of the morphometric pattern of the infraorbital nerve, indicating a difference in the mechanism of action between MNC and MSC. In line with this result, in IL-10 knockout mice, MSC transplantation did not induce an antinociceptive effect. SIGNIFICANCE Importantly, these data suggest an IL-10-induced disease-modifying profile related to MSC treatment and reinforce cell therapy's potential in treating trigeminal neuralgia.
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Affiliation(s)
| | | | | | | | - Girlaine Café Santos
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (FIOCRUZ), Salvador 40296-710, BA, Brazil.
| | | | - Milena Botelho Pereira Soares
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (FIOCRUZ), Salvador 40296-710, BA, Brazil; Institute of Advanced Systems in Health, SENAI CIMATEC, Salvador 41650-010, BA, Brazil.
| | - Cristiane Flora Villarreal
- Faculty of Pharmacy, Federal University of Bahia, Salvador 40170-115, BA, Brazil; Gonçalo Moniz Institute, Oswaldo Cruz Foundation (FIOCRUZ), Salvador 40296-710, BA, Brazil.
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Pergolizzi JV, LeQuang JA, El-Tallawy SN, Wagner M, Ahmed RS, Varrassi G. An update on pharmacotherapy for trigeminal neuralgia. Expert Rev Neurother 2024; 24:773-786. [PMID: 38870050 DOI: 10.1080/14737175.2024.2365946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Accepted: 06/05/2024] [Indexed: 06/15/2024]
Abstract
INTRODUCTION Trigeminal neuralgia is a rare condition that can be effectively treated by carbamazepine or oxcarbazepine but these older drugs are associated with dose-dependent and potentially treatment-limiting adverse effects. Third-generation anticonvulsants, new calcitonin gene-related peptide blockers for migraine, and older drugs such as ketamine and cannabinoids may be promising adjuvants or monotherapeutic options. AREAS COVERED The new drugs, their presumed mechanisms of action, safety and efficacy are discussed herein. There is a paucity of robust clinical evidence in support of these drugs for trigeminal neuralgia. New migraine agents are considered as well although migraines and trigeminal neuralgia are distinct, albeit similar, conditions. No new drugs have been released to market in recent years with the specific indication of trigeminal neuralgia. EXPERT OPINION In real-world clinical practice, about half of trigeminal neuralgia patients take more than one agent for prevention and combination therapy may be the optimal approach. Combination therapy might allow for lower doses of carbamazepine or oxcarbazepine, thus reducing the number and severity of potential adverse events but the potential for pharmacokinetic drug-drug interactions must be considered. Drug therapy for trigeminal neuralgia involves acute or abortive treatments, often administered in hospital versus long-term preventive therapy, usually involving oral agents.
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Affiliation(s)
| | | | - Salah N El-Tallawy
- Anesthesia and Pain Department, King Khalid University Hospital, College of Medicine, King Saud University, Riyadh, Saudi Arabia
- Anesthesia Department, Medicine, Minia University & NCI, Minia, Egypt
| | | | - Rania S Ahmed
- College of Medicine, Alfaisal University, Riyadh, Saudi Arabia
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Liang Y, Zhao Q, Neubert JK, Ding M. Causal interactions in brain networks predict pain levels in trigeminal neuralgia. Brain Res Bull 2024; 211:110947. [PMID: 38614409 DOI: 10.1016/j.brainresbull.2024.110947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Revised: 03/13/2024] [Accepted: 04/10/2024] [Indexed: 04/15/2024]
Abstract
Trigeminal neuralgia (TN) is a highly debilitating facial pain condition. Magnetic resonance imaging (MRI) is the main method for generating insights into the central mechanisms of TN pain in humans. Studies have found both structural and functional abnormalities in various brain structures in TN patients as compared with healthy controls. Whereas studies have also examined aberrations in brain networks in TN, no studies have to date investigated causal interactions in these brain networks and related these causal interactions to the levels of TN pain. We recorded fMRI data from 39 TN patients who either rested comfortably in the scanner during the resting state session or tracked their pain levels during the pain tracking session. Applying Granger causality to analyze the data and requiring consistent findings across the two scanning sessions, we found 5 causal interactions, including: (1) Thalamus → dACC, (2) Caudate → Inferior temporal gyrus, (3) Precentral gyrus → Inferior temporal gyrus, (4) Supramarginal gyrus → Inferior temporal gyrus, and (5) Bankssts → Inferior temporal gyrus, that were consistently associated with the levels of pain experienced by the patients. Utilizing these 5 causal interactions as predictor variables and the pain score as the predicted variable in a linear multiple regression model, we found that in both pain tracking and resting state sessions, the model was able to explain ∼36 % of the variance in pain levels, and importantly, the model trained on the 5 causal interaction values from one session was able to predict pain levels using the 5 causal interaction values from the other session, thereby cross-validating the models. These results, obtained by applying novel analytical methods to neuroimaging data, provide important insights into the pathophysiology of TN and could inform future studies aimed at developing innovative therapies for treating TN.
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Affiliation(s)
- Yun Liang
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL, United States
| | - Qing Zhao
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL, United States
| | - John K Neubert
- Department of Orthodontics, University of Florida, Gainesville, FL, United States
| | - Mingzhou Ding
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL, United States.
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4
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Tang Q, Gao S, Wang C, Zheng K, Zhang J, Huang H, Li Y, Ma Y. A prospective cohort study on perioperative percutaneous balloon compression for trigeminal neuralgia: safety and efficacy analysis. Neurosurg Rev 2024; 47:86. [PMID: 38366200 DOI: 10.1007/s10143-024-02323-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 02/07/2024] [Accepted: 02/13/2024] [Indexed: 02/18/2024]
Abstract
With the recent emergence of percutaneous balloon compression (PBC) as a promising treatment for trigeminal neuralgia (TN), there is a growing need for research on its safety and efficacy. This study was designed to evaluate the safety and efficacy of PBC in the treatment of TN patients during the perioperative period. This study involved a total of 400 TN patients who were selected and treated with PBC at our institution. The clinical data and short-term outcomes were analyzed based on sex, initial PBC treatment for TN, and subsequent PBC treatment for recurrent TN after previous PBC or microvascular decompression (MVD) or radiofrequency thermocoagulation (RFT). No statistically significant difference was found when comparing postoperative pain relief between male and female patients with TN. Nevertheless, female patients were found to be more vulnerable than male patients to abnormal facial sensations (P = 0.001), diplopia (P = 0.015), postoperative headache (P = 0.012), and hyposmia (P = 0.029). Additionally, it was observed that there was no substantial difference in the postoperative pain relief rate between the first-time PBC group and PBC for recurrent TN patients postoperatively following procedures such as PBC, MVD, and RFT. In conclusion, this study has shown that PBC treatment is effective in managing TN in both males and females, regardless of whether the treatment was administered as a primary intervention or following prior surgical procedures such as PBC, MVD, or RFT. Nonetheless, it is noted that the risk of postoperative complications appears to be higher in female patients compared to male patients.
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Affiliation(s)
- Qianqian Tang
- Dalian Medical University, Dalian, Liaoning Province, China
- Department of Anesthesiology, People's Hospital of China Medical University (People's Hospital of Liaoning Province), Shenyang, China
| | - Shihui Gao
- Dalian Medical University, Dalian, Liaoning Province, China
- Department of Anesthesiology, People's Hospital of China Medical University (People's Hospital of Liaoning Province), Shenyang, China
| | - Changming Wang
- Department of Anesthesiology, People's Hospital of China Medical University (People's Hospital of Liaoning Province), Shenyang, China.
| | - Kai Zheng
- Department of Anesthesiology, Jinan Eighth Hospital, Shandong, China.
| | - Jing Zhang
- Department of Anesthesiology, People's Hospital of China Medical University (People's Hospital of Liaoning Province), Shenyang, China
| | - Haitao Huang
- Department of Neurosurgery II, People's Hospital of China Medical University (People's Hospital of Liaoning Province), Shenyang, China
| | - Yanfeng Li
- Department of Neurosurgery II, People's Hospital of China Medical University (People's Hospital of Liaoning Province), Shenyang, China
| | - Yi Ma
- Department of Neurosurgery II, People's Hospital of China Medical University (People's Hospital of Liaoning Province), Shenyang, China
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Tang Q, Gao S, Wang C, Guan Z, Zhang J, Huang H, Li Y, Ma Y, Yan Z. Clinical observation of perioperative negative emotional changes in patients with percutaneous balloon compression for primary trigeminal neuralgia: A prospective cohort study. J Clin Neurosci 2024; 120:5-11. [PMID: 38159423 DOI: 10.1016/j.jocn.2023.12.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 12/20/2023] [Accepted: 12/22/2023] [Indexed: 01/03/2024]
Abstract
OBJECTIVE To investigate the prevalence of negative emotions in trigeminal neuralgia (TN) patients, to identify risk factors associated with anxiety and depression, and further to explore the impact of percutaneous balloon compression (PBC) on anxiety and depression in TN patients during the perioperative period. METHODS 400 patients with primary TN treated with PBC at our institution from November 2021 to April 2023 were included. We analyzed visual analogue scale (VAS) and the Hospital Anxiety and Depression Scale (HADS) scores. The patients' clinical data and short-term clinical outcomes were gathered and subjected to statistical analysis. RESULTS This study included a total of 400 patients diagnosed with primary TN. Patients who had high pain intensity (OR 1.20, 95 % CI 1.02-1.41; p = 0.025) or a history of multiple previous TN procedures (OR 1.49, 95 % CI 1.03-2.16; p = 0.036), were more prone to anxiety. Patients who were female (OR 1.59, 95 % CI 1.03-2.44; p = 0.036), had high pain intensity (OR 1.28, 95 % CI 1.08-1.52; p = 0.004) or had a history of multiple previous TN procedures (OR 1.48, 95 % CI 1.11-1.98; p = 0.008), were more likely to have depression. Significant improvements in anxiety and depressive symptoms were observed in patients who experienced pain relief after PBC (p < 0.001). CONCLUSIONS Female gender, high pain intensity, and a history of multiple prior TN procedures are associated risk factors for anxiety and depression in TN patients. PBC can provide patients with a high pain relief rate and significantly improve their anxiety and depression symptoms during the perioperative period.
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Affiliation(s)
- Qianqian Tang
- Dalian Medical University, Dalian, Liaoning Province, China; Department of Anesthesiology, People's Hospital of China Medical University (People's Hospital of Liaoning Province), Shenyang, China
| | - Shihui Gao
- Dalian Medical University, Dalian, Liaoning Province, China; Department of Anesthesiology, People's Hospital of China Medical University (People's Hospital of Liaoning Province), Shenyang, China
| | - Changming Wang
- Department of Anesthesiology, People's Hospital of China Medical University (People's Hospital of Liaoning Province), Shenyang, China.
| | - Zhanying Guan
- Department of Anesthesiology, Liaoning Jinqiu Hospital, Shenyang, China
| | - Jing Zhang
- Department of Anesthesiology, People's Hospital of China Medical University (People's Hospital of Liaoning Province), Shenyang, China
| | - Haitao Huang
- Department of Neurosurgery II, People's Hospital of China Medical University (People's Hospital of Liaoning Province), Shenyang, China
| | - Yanfeng Li
- Department of Neurosurgery II, People's Hospital of China Medical University (People's Hospital of Liaoning Province), Shenyang, China
| | - Yi Ma
- Department of Neurosurgery II, People's Hospital of China Medical University (People's Hospital of Liaoning Province), Shenyang, China
| | - Zenglong Yan
- Third Department of Extraskeletal Surgery, People's Hospital of China Medical University (People's Hospital of Liaoning Province), Shenyang, China.
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Mousavi SH, Lindsey JW, Westlund KN, Alles SRA. Trigeminal Neuralgia as a Primary Demyelinating Disease: Potential Multimodal Evidence and Remaining Controversies. THE JOURNAL OF PAIN 2024; 25:302-311. [PMID: 37643657 DOI: 10.1016/j.jpain.2023.08.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 08/17/2023] [Accepted: 08/23/2023] [Indexed: 08/31/2023]
Abstract
Trigeminal neuralgia is a heterogeneous disorder with likely multifactorial and complex etiology; however, trigeminal nerve demyelination and injury are observed in almost all patients with trigeminal neuralgia. The current management strategies for trigeminal neuralgia primarily involve anticonvulsants and surgical interventions, neither of which directly address demyelination, the pathological hallmark of trigeminal neuralgia, and treatments targeting demyelination are not available. Demyelination of the trigeminal nerve has been historically considered a secondary effect of vascular compression, and as a result, trigeminal neuralgia is not recognized nor treated as a primary demyelinating disorder. In this article, we review the evolution of our understanding of trigeminal neuralgia and provide evidence to propose its potential categorization, at least in some cases, as a primary demyelinating disease by discussing its course and similarities to multiple sclerosis, the most prevalent central nervous system demyelinating disorder. This proposed categorization may provide a basis in investigating novel treatment modalities beyond the current medical and surgical interventions, emphasizing the need for further research into demyelination of the trigeminal sensory pathway in trigeminal neuralgia. PERSPECTIVE: This article proposes trigeminal neuralgia as a demyelinating disease, supported by histological, clinical, and radiological evidence. Such categorization offers a plausible explanation for controversies surrounding trigeminal neuralgia. This perspective holds potential for future research and developing therapeutics targeting demyelination in the condition.
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Affiliation(s)
- Seyed H Mousavi
- Division of Multiple Sclerosis and Neuroimmunology, Department of Neurology, University of Texas Health Science Center at Houston (UTHealth), Houston, Texas
| | - John W Lindsey
- Division of Multiple Sclerosis and Neuroimmunology, Department of Neurology, University of Texas Health Science Center at Houston (UTHealth), Houston, Texas
| | - Karin N Westlund
- Department of Anesthesiology & Critical Care Medicine, University of New Mexico Health Sciences Center, Albuquerque, New Mexico
| | - Sascha R A Alles
- Department of Anesthesiology & Critical Care Medicine, University of New Mexico Health Sciences Center, Albuquerque, New Mexico
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Graffeo CS, Scherschinski L, Ibrahim S, Baranoski JF, Srinivasan VM, Lawton MT. Fenestrated Aneurysm Clip Trigeminal Decompression after CyberKnife Treatment Failure. J Neurol Surg B Skull Base 2024; 85:106-108. [PMID: 38274478 PMCID: PMC10807953 DOI: 10.1055/s-0042-1760295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 11/23/2022] [Indexed: 01/18/2023] Open
Abstract
Objective This article describes a novel technique for trigeminal nerve decompression in the setting of refractory trigeminal neuralgia (TN). Design Technical note with an illustrative case example and operative video. Setting Outpatient, inpatient, and operating room of a quaternary neurosurgical referral center. Participant A woman in her early 70s who had previously undergone linear accelerator-based stereotactic radiotherapy (i.e., CyberKnife) and achieved 2 years of partial pain relief. However, facial pain, numbness, and parasympathetic dysfunction returned and became unbearable. Main Outcome Measure Durable relief of TN. Results Microvascular decompression was recommended for refractory TN. Intraoperatively, the trigeminal nerve was markedly attenuated from previous irradiation, with the superior cerebellar artery (SCA) loop embedded in the nerve at its root entry zone. The arterial loop was mobilized into a new position superior to the nerve, thus liberating it from the impingement. The tentorium was incised, and a fenestrated aneurysm clip was positioned such that the SCA loop was transmitted via the fenestration. The clip was applied across the tentorium, thus suspending the artery in a kink-free orientation that made no contact with the nerve. Conclusion This procedure provided excellent neurovascular decompression without placing mechanical strain on the nerve, relieving the patient's persistent postirradiation TN. The technique could have broader applications for other challenging or atypical microvascular decompression procedures.
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Affiliation(s)
- Christopher S. Graffeo
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, United States
| | - Lea Scherschinski
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, United States
| | - Sufyan Ibrahim
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, United States
| | - Jacob F. Baranoski
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, United States
| | - Visish M. Srinivasan
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, United States
| | - Michael T. Lawton
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, United States
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Wang Y, Guo W, Du Y, Li Y, Shi H, Qian T. Efficacy and safety of percutaneous balloon compression for bilateral trigeminal neuralgia: a retrospective study. Acta Neurochir (Wien) 2024; 166:51. [PMID: 38289483 DOI: 10.1007/s00701-024-05947-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Accepted: 01/08/2024] [Indexed: 02/01/2024]
Abstract
BACKGROUND Percutaneous balloon compression (PBC) of the Gasserian ganglion is steadily gaining traction within the trigeminal neuralgia (TN) community. Bilateral trigeminal neuralgia (BTN) is a rare condition, and its treatment remains challenging. As far as we know, there are currently no research reports on the treatment outcomes of PBC for BTN.The purpose of this study is to meticulously evaluate the efficacy and safety of PBC for BTN in our medical institution. METHODS In this retrospective study, we collected and analyzed the medical records of all patients with BTN who underwent the PBC procedure at the Department of Neurosurgery at Hebei General Hospital from July 2017 to July 2023. After undergoing PBC therapy, all patients were promptly assessed for treatment efficacy based on the modified Barrow Neurological Institute (BNI) pain intensity grading scale. RESULTS All 37 patients with BTN experienced significant pain relief (BNI I-IIIb) immediately following unilateral PBC treatment. Among these patients, 25 reported relief from pain on the non-operative side, which was effectively managed with medication. Out of the 12 patients who did not experience improvement in contralateral symptoms, 11 received contralateral PBC. Out of the 48 treated sides, 47 sides (97.9%) achieved excellent pain control following a single PBC procedure. The follow-up times ranged from 2 to 62 months. At the 1-year follow-up, 94.6% of the patients maintained excellent therapeutic outcomes.Three recurrent patients underwent repeated unilateral PBC, and all of them maintained excellent pain control postoperatively. At the last follow-up, satisfaction was at 91.7% (measured using the Likert scale), with no severe complications occurring. CONCLUSIONS The results indicate that PBC is an effective and relatively safe method for treating BTN, offering a valuable option for pain control in these rare cases of TN.
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Affiliation(s)
- Yinzhan Wang
- Department of Neurosurgery, Hebei General Hospital, 348# Heping Road, Shijiazhuang City, 050000, Hebei Province, China
| | - Wenchang Guo
- Department of Neurosurgery, Hebei General Hospital, 348# Heping Road, Shijiazhuang City, 050000, Hebei Province, China
| | - Yihui Du
- Department of Neurosurgery, Hebei General Hospital, 348# Heping Road, Shijiazhuang City, 050000, Hebei Province, China
| | - Yang Li
- Department of Neurosurgery, Hebei General Hospital, 348# Heping Road, Shijiazhuang City, 050000, Hebei Province, China
| | - Haowei Shi
- Department of Neurosurgery, Hebei General Hospital, 348# Heping Road, Shijiazhuang City, 050000, Hebei Province, China
| | - Tao Qian
- Department of Neurosurgery, Hebei General Hospital, 348# Heping Road, Shijiazhuang City, 050000, Hebei Province, China.
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Xenopoulou D, Greco E. Crossroads of Neurodermatology: Trigeminal Trophic Syndrome. Cureus 2024; 16:e51760. [PMID: 38318601 PMCID: PMC10839548 DOI: 10.7759/cureus.51760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/04/2024] [Indexed: 02/07/2024] Open
Abstract
A 98-year-old female, with a past medical history of trigeminal neuralgia (TN) and non-melanoma skin cancer, presented with a crescent-shaped ulcer on her right nasal ala that had been present for months. On exam, the patient was aware of her issue, readily admitted to manipulation of the area, and had a past medical history significant for TN. The patient's history and clinical presentation led to a diagnosis of trigeminal trophic syndrome (TTS). TTS is an extremely rare, ulcerative condition that can arise in patients suffering from TN. While TN itself is well-documented, treatment is often challenging and usually focused on achieving symptomatic relief; for this patient, she did not achieve adequate management of her neuropathic symptoms, and her condition progressed to TTS. Thus, given the patient's ongoing multi-modal TN treatment, she was encouraged not to pick or manipulate the area to the best of her ability to curb the extent of ulceration. Given that TTS is so infrequently seen, we are hopeful that, by identifying the specifics of the underlying neuronal aberrancies in the future, we may be able to better grasp TTS's pathophysiology, ulcer development, and potential future treatment options.
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Affiliation(s)
- Dimitra Xenopoulou
- Dermatology, New York Institute of Technology College of Osteopathic Medicine, Old Westbury, USA
| | - Evelyn Greco
- Dermatology, New York Institute of Technology College of Osteopathic Medicine, Old Westbury, USA
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Niazi F, Elkaim LM, Zadeh Khomami NM, Levett JJ, Weil AG, Hodaie M, Alotaibi NM. Microvascular Decompression and Trigeminal Neuralgia: Patient Sentiment Analysis Using Natural Language Processing. World Neurosurg 2023; 180:e528-e536. [PMID: 37778624 DOI: 10.1016/j.wneu.2023.09.107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 09/25/2023] [Indexed: 10/03/2023]
Abstract
OBJECTIVE Microvascular decompression (MVD) as a treatment for trigeminal neuralgia (TGN) has high success rate but is associated with risks of complication. This study analyzes Twitter to provide insights into discussions surrounding MVD for patients with TGN. METHODS A Twitter search performed in April 2022 yielded 491 tweets from 426 accounts. Tweets and accounts were classified thematically, and descriptive statistics were used for various social media metrics. Using a natural language processing machine learning algorithm, sentiment analysis (SA) was performed to evaluate patient perspectives before and after surgery, and a multivariate regression model was used to identify predictors of higher engagement metrics (likes, retweets, quote tweets, replies). RESULTS Most accounts were patients, caregivers, and other members of the public (70%). The most encountered themes were research (47%) and personal experiences (33.4%). SA of tweets about patient experiences showed that 40.2% of tweets were positive, 31.1% were neutral and 28.7% were negative. Negative tweets decreased significantly in postoperative tweets and mostly discussed complications or failure of surgery (63%). On multivariate analysis, only inclusion of media (photo or video) in a Tweet was associated with higher engagement metrics. CONCLUSIONS This study provides a comprehensive review of Twitter use discussing MVD in TGN and is the first to assess patient satisfaction after treatment using SA. The data presented on patient perspectives on social media could help physicians establish direct lines of communication with patients, fostering a more patient-focused care.
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Affiliation(s)
- Farbod Niazi
- Department of Medicine, Université de Montréal, Montreal, Quebec, Canada
| | - Lior M Elkaim
- Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada.
| | | | - Jordan J Levett
- Department of Medicine, Université de Montréal, Montreal, Quebec, Canada
| | - Alexander G Weil
- Division of Neurosurgery, Sainte Justine Hospital, Montreal, Quebec, Canada
| | - Mojgan Hodaie
- Department of Surgery, Division of Neurosurgery, University of Toronto, Toronto, Ontario, Canada
| | - Naif M Alotaibi
- Department of Neurosurgery, National Neuroscience Institute, King Fahad Medical City, Riyadh, Saudi Arabia
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11
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Martinez DM, Huh BK, Javed S. Case report: use of high-intensity laser therapy for treatment of trigeminal neuralgia. Pain Manag 2023; 13:709-716. [PMID: 38189105 DOI: 10.2217/pmt-2023-0112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2024] Open
Abstract
Trigeminal neuralgia represents a form of chronic facial pain that is characterized by its incapacitating nature. The current therapeutic approaches encompass pharmacological agents with carbamazepine or non-pharmacologic options including utilization of percutaneous rhizotomy, Gamma knife radiosurgery or microvascular decompression may be indicated in certain cases. While the interventions may be effective, medications have negative side effects and procedures are invasive which can pose challenges for patients with various comorbidities. High-intensity laser therapy (HILT) has demonstrated safety and efficacy for many types of chronic pain such as musculoskeletal, autoimmune and neuropathic. Herein, we demonstrate the benefits of HILT therapy in the management of trigeminal neuralgia in a 72 year-old patient with a complex history of facial surgery and radiation who had failed pharmacological treatments and denied any invasive procedures.
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Affiliation(s)
- Diego M Martinez
- Tilman J. Fertitta Family College of Medicine, University of Houston, 5055 Medical Cir, Houston, TX 77204, USA
- Department of Pain Medicine, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Billy K Huh
- Department of Pain Medicine, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Saba Javed
- Department of Pain Medicine, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
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12
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Kalluri AL, So RJ, Ran KR, Xie ME, Kilgore C, Nair SK, Huang J, Bettegowda C, Xu R. Preoperative Characteristics and Postoperative Pain Outcomes in Trigeminal Neuralgia With Concomitant Autoimmune Disease. Neurosurgery 2023; 93:1075-1081. [PMID: 37306434 DOI: 10.1227/neu.0000000000002549] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Accepted: 04/06/2023] [Indexed: 06/13/2023] Open
Abstract
BACKGROUND AND OBJECTIVES Although the association between multiple sclerosis and trigeminal neuralgia (TN) is well established, little is known about TN pain characteristics and postoperative pain outcomes after microvascular decompression (MVD) in patients with TN and other autoimmune diseases. In this study, we aim to describe presenting characteristics and postoperative outcomes in patients with concomitant TN and autoimmune disease who underwent an MVD. METHODS A retrospective review of all patients who underwent an MVD at our institution between 2007 and 2020 was conducted. The presence and type of autoimmune disease were recorded for each patient. Patient demographics, comorbidities, clinical characteristics, postoperative Barrow Neurological Institute (BNI) pain and numbness scores, and recurrence data were compared between groups. RESULTS Of the 885 patients with TN identified, 32 (3.6%) were found to have concomitant autoimmune disease. Type 2 TN was more common in the autoimmune cohort ( P = .01). On multivariate analysis, concomitant autoimmune disease, younger age, and female sex were found to be significantly associated with higher postoperative BNI score ( P = .04, <0.001, and <0.001, respectively). In addition, patients with autoimmune disease were more likely to experience significant pain recurrence ( P = .009) and had shorter time to recurrence on Kaplan-Meier analysis ( P = .047), although this relationship was attenuated on multivariate Cox proportional hazards regression. CONCLUSION Patients with concomitant TN and autoimmune disease were more likely to have Type 2 TN, had worse postoperative BNI pain scores at the final follow-up after MVD, and were more likely to experience recurrent pain than patients with TN alone. These findings may influence postoperative pain management decisions for these patients and support a possible role for neuroinflammation in TN pain.
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Affiliation(s)
- Anita L Kalluri
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore , Maryland , USA
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13
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Kalluri AL, So RJ, Nair SK, Materi J, Wang D, Behera N, Kornberg MD, Huang J, Lim M, Bettegowda C, Xu R. The role of multiple sclerosis subtype in microvascular decompression outcomes for patients with trigeminal neuralgia. Clin Neurol Neurosurg 2023; 233:107967. [PMID: 37703615 DOI: 10.1016/j.clineuro.2023.107967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 09/02/2023] [Accepted: 09/06/2023] [Indexed: 09/15/2023]
Abstract
OBJECTIVES While patients with concomitant trigeminal neuralgia (TN) and multiple sclerosis (MS) are understood to experience a more intractable pain phenotype, whether TN pain outcomes differ by the presenting MS subtype is not well characterized. This study's objective is to compare post-operative pain and numbness outcomes following microvascular decompression (MVD) in TN patients with either relapsing-remitting MS (RRMS) or progressive MS. METHODS We retrospectively reviewed all TN patients who underwent MVDs at our institution from 2007 to 2020. Of the 1044 patients reviewed, 45 (4.3%) patients with MS were identified. Patient demographics, procedural characteristics, and post-operative pain and numbness scores were recorded and compared. Factors associated with pain recurrence were assessed using survival analyses and multivariate regressions. RESULTS Of the resulting 45 MS patients, 34 (75.6%) patients presented with the RRMS subtype, whereas 11 (24.4%) patients exhibited progressive MS. Using an adjusted multivariate ordinal regression, the subtype of MS was not significantly associated with the Barrow Neurological Institute (BNI) pain score at final follow-up. Using a Kaplan-Meier survival analysis and a multivariate Cox proportional hazards regression, respectively, RRMS was significantly associated with a shorter post-operative pain-free interval (p = 0.04) as well as a greater risk for pain recurrence (p = 0.02). CONCLUSIONS Although the degree of pain at final follow-up may not differ, RRMS patients are at increased risk for pain recurrence following MVD for TN. These results align with a growing understanding that neuroinflammation may play a significant role in TN pain.
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Affiliation(s)
- Anita L Kalluri
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, United States of America
| | - Raymond J So
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, United States of America
| | - Sumil K Nair
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, United States of America
| | - Joshua Materi
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, United States of America
| | - Dorothy Wang
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, United States of America
| | - Niranjan Behera
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, United States of America
| | - Michael D Kornberg
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, United States of America
| | - Judy Huang
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, United States of America
| | - Michael Lim
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA, United States of America
| | - Chetan Bettegowda
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, United States of America
| | - Risheng Xu
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, United States of America.
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Ali A, Bastianon Santiago R, Isidor J, Mandel M, Adada M, Obrzut M, Adada B, Borghei-Razavi H. Debilitating trigeminal neuralgia secondary to idiopathic intracranial hypertension. Heliyon 2023; 9:e19756. [PMID: 37809543 PMCID: PMC10559059 DOI: 10.1016/j.heliyon.2023.e19756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 07/21/2023] [Accepted: 08/31/2023] [Indexed: 10/10/2023] Open
Abstract
Idiopathic intracranial hypertension (IIH) is characterized by raised intracranial pressure with unknown etiology. The most common neurological manifestations are headache and visual loss. Often, other cranial nerve impairments are also found, most commonly in the VI nerve. Trigeminal neuralgia (TN) is a debilitating condition that is most frequently caused by neurovascular pathology, but TN secondary to IIH is a rare and poorly described topic. Possible explanations of TN in these patients include the distortion of the local anatomy at CN entry zones and fluid displacement causing distortion of the Meckel's cave. In the case below we describe the clinical course of an obese female patient with TN-like pain who underwent a ventriculoperitoneal shunt to treat IIH and experienced complete resolution of both conditions.
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Affiliation(s)
- Assad Ali
- Cleveland Clinic Florida, Department of Neurosurgery, Weston, FL, United States
| | | | - Julio Isidor
- Cleveland Clinic Florida, Department of Neurosurgery, Weston, FL, United States
| | - Mauricio Mandel
- Cleveland Clinic Florida, Department of Neurosurgery, Weston, FL, United States
| | - Mohamad Adada
- Cleveland Clinic Florida, Department of Neurosurgery, Weston, FL, United States
| | - Michal Obrzut
- Cleveland Clinic Florida, Department of Neurosurgery, Weston, FL, United States
| | - Badih Adada
- Cleveland Clinic Florida, Department of Neurosurgery, Weston, FL, United States
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Taranta V, Saporito G, Ornello R, Splendiani A, Bruno F, Sucapane P, Masciocchi C, Marinangeli F, Cacchio A, Di Cesare E, Pistoia F. Magnetic Resonance-guided Focused Ultrasound thalamotomy for refractory neuropathic pain: a systematic review and critical appraisal of current knowledge. Ther Adv Neurol Disord 2023; 16:17562864231180729. [PMID: 37363184 PMCID: PMC10286169 DOI: 10.1177/17562864231180729] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 05/17/2023] [Indexed: 06/28/2023] Open
Abstract
Background Magnetic Resonance-guided Focused Ultrasound (MRgFUS) is an innovative therapeutical approach for medically refractory tremor. It is currently under investigation for other neurological diseases including refractory neuropathic pain (NP). Objective The objective of this systematic review is to analyze available evidence about the effectiveness and safety profile of MRgFUS in the treatment of refractory NP. Methods Eligible studies were identified by searching published studies in PubMed and Scopus databases from inception to December 2022 and by identifying ongoing studies registered on the clinicaltrials.gov website. The study was registered in PROSPERO (ID: CRD42021277154). Results We found three published observational studies and nine ongoing studies. In published studies, the involved population ranged from 8 to 46 patients with overall 66 patients being included with NP or trigeminal neuralgia. The target lesion was in the posterior part of the central lateral nucleus of the thalamus, bilaterally. Outcomes were assessed at different times through the Visual Analog Scale, showing a variable degree of improvement. Adverse events were rare, mild, and transient (vertigo, paresthesias, and dysesthesias) with intracerebral bleeding being reported as major adverse event in one case only. Among ongoing studies, we found three prospective, randomized, sham-controlled, crossover trials (RCTs) and six observational studies. Inclusion criteria are previous failure of more than three pharmacological treatments and NP duration longer than 6 months. The thalamus is the main proposed target and measured outcomes are accuracy of the procedure and pain relief, with a follow-up period ranging from 1 week to 1 year. Conclusion This systematic review suggests that, although high-quality studies are lacking, available evidence endorses the effectiveness and safety of MRgFUS in the management of NP. Ongoing RCTs will provide more robust data to understand benefits and risks of the procedure. Registration PROSPERO (ID: CRD42021277154).
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Affiliation(s)
- Valentina Taranta
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, L’Aquila, Italy
| | - Gennaro Saporito
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, L’Aquila, Italy
| | - Raffaele Ornello
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, L’Aquila, Italy
| | - Alessandra Splendiani
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, L’Aquila, Italy
| | - Federico Bruno
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, L’Aquila, Italy
| | | | - Carlo Masciocchi
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, L’Aquila, Italy
| | - Franco Marinangeli
- Department of Clinical Medicine, Public Health, Life Sciences and Environment Life, University of L’Aquila, L’Aquila, Italy
| | - Angelo Cacchio
- Department of Clinical Medicine, Public Health, Life Sciences and Environment Life, University of L’Aquila, L’Aquila, Italy
| | - Ernesto Di Cesare
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, L’Aquila, Italy
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16
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Kilgore CB, So RJ, Storm K, Nair SK, Ran KR, Kalluri AL, Lim M, Huang J, Bettegowda C, Xu R. Sex-Specific Pain Outcomes Following Microvascular Decompression for Trigeminal Neuralgia. World Neurosurg 2023; 173:e431-e435. [PMID: 36828277 PMCID: PMC11060168 DOI: 10.1016/j.wneu.2023.02.074] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 02/14/2023] [Accepted: 02/15/2023] [Indexed: 02/25/2023]
Abstract
BACKGROUND Trigeminal neuralgia (TN) is more prevalent among women. However, while microvascular decompression (MVD) is the most effective long-term surgical treatment for TN, it is unclear whether it is equally efficacious for men and women. We sought to characterize the relationship between sex and pain outcomes following MVD for TN. METHODS From 2007 to 2020, 938 unilateral TN patients were treated with MVD at our institution. Patient demographics, clinical characteristics, operative features, and pain outcomes were recorded. Differences between men and women were analyzed via t-test and chi-squared analyses. A multivariate ordinal regression was used to establish significant predictors of pain outcome. Differences in time to pain recurrence were assessed via Cox proportional hazards and Kaplan-Meier nonparametric survival analysis. RESULTS A majority (67%) of the 938 patients analyzed were female. Men and women presented with similar preoperative pain severity (P = 0.17). Female sex (P = 0.048) and younger age (P = 0.03) were independently associated with worsened Barrow Neurological Institute pain scores at 3-month follow-up on multivariate analysis. Women were also more likely to experience recurrence than men (P = 0.01), and time to recurrence was shorter among women (P = 0.02). Only female sex was independently associated with increased risk of postoperative pain recurrence on multivariate Cox proportional hazards regression (P = 0.01). CONCLUSIONS Female TN patients undergoing MVD had worse pain outcomes, more frequent pain recurrence, and shorter time to recurrence. Our results indicate a sex-specific dimorphism in response to MVD among TN patients.
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Affiliation(s)
- Collin B Kilgore
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA; Medical Scientist Training Program, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Raymond J So
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Kaitlyn Storm
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Sumil K Nair
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Kathleen R Ran
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Anita L Kalluri
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Michael Lim
- Department of Neurosurgery, Stanford University School of Medicine, Palo Alto, California, USA
| | - Judy Huang
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Chetan Bettegowda
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Risheng Xu
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
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17
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Xu R, So RJ, Lee KK, Kalluri AL, Materi J, Nair SK, Huang J, Lim M, Bettegowda C. Sequential onset of bilateral trigeminal neuralgia: clinical presentation and outcomes. Clin Neurol Neurosurg 2023; 229:107745. [PMID: 37146369 DOI: 10.1016/j.clineuro.2023.107745] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 04/19/2023] [Accepted: 04/20/2023] [Indexed: 05/07/2023]
Abstract
PURPOSE Sequential onset of bilateral trigeminal neuralgia (TN) is rare and not well-described in the literature. The objective of this study was to characterize demographic, clinical, and procedural characteristics of patients with sequential onset bilateral TN. METHODS We retrospectively reviewed patients presenting with sequential onset bilateral TN at our institution from 2007 to 2020. Patient demographics, clinical diagnoses, pain outcomes, and procedural characteristics were recorded and compared. Factors associated with pain recurrence were assessed using survival analyses and multivariate regressions. RESULTS We identified 34 patients who presented with sequential onset bilateral TN. The average age of onset for the index case was 49.9 ± 15.5 years, and 58.0 ± 16.8 years for the contralateral case. In total for our cohort, 91 surgical procedures were performed for the index case, and 70 for the contralateral case. With each additional surgical intervention, pain-free survival was more likely to decrease, p = 0.05. When controlled for order of intervention, glycerin rhizotomy (p = 0.01) and glycerin-radiofrequency rhizotomy (p = 0.05) were more likely associated with pain recurrence compared to microvascular decompression. While pain outcomes were significantly decreased in our cohort at final follow-up, 82.4% of patients were still dependent on medication for pain management after an average of 5.03 ± 7.74 years. CONCLUSION Our results represent one of the largest series of sequential onset bilateral TN in North America. Our study demonstrates the high treatment burden and chronicity of pain encountered in this population.
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Affiliation(s)
- Risheng Xu
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Raymond J So
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Kevin K Lee
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Anita L Kalluri
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Joshua Materi
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Sumil K Nair
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Judy Huang
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Michael Lim
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA, United States
| | - Chetan Bettegowda
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, United States.
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18
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Banerjee S, Iwanaga J, Dumont AS, Tubbs RS. An unusual finding of the Porus trigeminus: Case report with histological findings. Anat Histol Embryol 2023. [DOI: 10.1111/ahe.12917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 02/14/2023] [Accepted: 03/07/2023] [Indexed: 03/29/2023]
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Saepoo J, Pangsomboon K, Tianviwat S. Awareness of HLA-B* 15:02 screening in trigeminal neuralgia and the gene screening policy among dentists in Southern Thailand. SPECIAL CARE IN DENTISTRY 2023; 43:286-293. [PMID: 35973978 DOI: 10.1111/scd.12768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 06/26/2022] [Accepted: 07/26/2022] [Indexed: 11/30/2022]
Abstract
OBJECTIVES To determine the factors associated with public hospital dentists' awareness of HLA-B*15:02 screening in trigeminal neuralgia (TN) and the national gene screening policy in Thailand. METHODS Cross-sectional study. A validated questionnaire was distributed to public hospital dentists with at least 1 year of practice in Southern Thailand (n = 760) to assess their knowledge of TN, carbamazepine (CBZ) use, awareness of HLA-B*15:02 screening, and the gene screening policy. RESULTS A total of 385 dentists participated (50.7% response rate); 81.3% of respondents were aware of HLA-B*15:02 screening. However, 18.7% of dentists were not aware of the importance of gene testing. Furthermore, dentists who were aware of gene screening had significantly better knowledge of TN diagnosis and CBZ use than "unaware" dentists. Awareness of HLA-B*15:02 screening was also significantly associated with dental specialty. Moreover, 80.5% of respondents were not aware of the gene screening policy. The primary problems related to the policy were its inefficient publication, poor implementation, and lack of clinical practice guidelines (CPGs) to encourage dentists to follow the policy and prescribe gene tests. CONCLUSION While most hospital dentists were aware of the necessity of HLA-B*15:02 screening prior to prescribing CBZ in TN, the majority were unaware of the national gene screening policy. Dental specialty and knowledge were associated with awareness of HLA-B*15:02 screening.
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Affiliation(s)
- Jirayu Saepoo
- Section of Oral Medicine, Department of Oral Diagnostic Sciences, Faculty of Dentistry, Prince of Songkla University, Hatyai, Songkhla, Thailand
| | - Kanokporn Pangsomboon
- Section of Oral Medicine, Department of Oral Diagnostic Sciences, Faculty of Dentistry, Prince of Songkla University, Hatyai, Songkhla, Thailand
| | - Sukanya Tianviwat
- Department of Preventive Dentistry, Faculty of Dentistry, Prince of Songkla University, Hatyai, Songkhla, Thailand
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20
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Nascimento RFV, Pipek LZ, de Aguiar PHP. Is percutaneous balloon compression better than microvascular decompression to treat trigeminal neuralgia? A systematic review and meta-analysis. J Clin Neurosci 2023; 109:11-20. [PMID: 36634472 DOI: 10.1016/j.jocn.2023.01.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 12/20/2022] [Accepted: 01/03/2023] [Indexed: 01/11/2023]
Abstract
BACKGROUND Trigeminal neuralgia (TN) is a neuropathic pain that affects one or more branches of the trigeminal nerve. Surgical options after pharmacological failure are Microvascular Decompression (MVD) or percutaneous procedures, which include Balloon Compression (PBC). This study aims to describe pain outcomes and complications after PBC and MVD procedures for patients with trigeminal neuralgia. METHODS We performed a systematic review and meta-analysis on PubMed, EMBASE, LILACS, and Web of Science databases up to April 2022, following PRISMA guidelines (Preferred Reporting Items for Systematic Reviews and meta-Analysis). Articles that separately describe pain outcome for MVD and PBC were included. MINORS tool was used for bias assessment. Meta-analysis results are presented in forest plot and funnel plot. RESULTS 853 studies were assessed for screening, and 11 studies met the inclusion criteria for this review. A total of 1046 patients underwent PBC and 1324 underwent MVD. The subgroup analysis for patients without multiple sclerosis shows that MVD was associated with lower number of patients with pain than PBC, with an OR value of 0.54 (95 % CI 0.34-0.84). All other analyses evidenced a tendency for better outcomes after the MVD procedure, but with no statistically significant difference. CONCLUSION Considering short and long pain relief, recurrence of pain and total complications for MVD and PBC, our study found that MVD is the best surgical option available for trigeminal neuralgia.
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Affiliation(s)
| | | | - Paulo Henrique Pires de Aguiar
- Department of Neurosurgery, Santa Paula Hospital, São Paulo, Brazil; Department of Research and Innovation, Laboratory of Cellular and Molecular Biology, FMABC, Santo André, São Paulo, Brazil; Department of Neurology, School of Medicine of Pontifical Catholic University of São Paulo, Sorocaba, São Paulo, Brazil; State Serviant Public Hospital, São Paulo, Brazil
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21
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Ahmad HS, Blue R, Ajmera S, Heman-Ackah S, Spadola M, Lazor JW, Lee JYK. The Influence of Radiologist Practice Setting on Identification of Vascular Compression from Magnetic Resonance Imaging in Trigeminal Neuralgia. World Neurosurg 2023; 171:e398-e403. [PMID: 36513300 DOI: 10.1016/j.wneu.2022.12.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 12/05/2022] [Accepted: 12/06/2022] [Indexed: 12/14/2022]
Abstract
OBJECTIVE Preoperative magnetic resonance imaging (MRI) studies are routinely ordered for trigeminal neuralgia (TN), though with contested reliability in contemporary literature. A potential reason for this disagreement is inconsistency in MRI reading methodologies. Here, we compare the rate of reported neurovascular compression on preoperative MRI by radiologists employed in community or private practice settings and academic neuroradiologists. METHODS A retrospective review was conducted on patients who underwent endoscopic microvascular decompression for TN with intraoperatively visualized neurovascular compression and primary read by a non-academic or community radiologist. Patient imaging was then re-read by a board-certified neuroradiologist practicing in an academic setting, who was blinded to the initial read and the side of TN symptoms. RESULTS Non-academic radiologists reported vascular compression in 26.0% (20/77) of all patients, and mention was rarely made of the non-pathological side (sensitivity = 26.0%). On academic neuroradiologist re-reads, vascular compression was noted in 87.0% (67/77) of patients on the pathological side and in 57.1% (44/77) on the non-pathological side (sensitivity = 87.0%, specificity = 42.9%). Isotropic/near isotropic 3-dimensional steady state or heavily T2-weighted sequences were read with 92.3% sensitivity and 36.9% specificity, compared to 58.3% sensitivity and 66.7% specificity using routine T2 weighted sequences. CONCLUSIONS The frequency of vascular compression reported by non-academic radiologists is much lower than what is reported by academic neuroradiologists reading the same MRI scans. These results highlight the effect of practice setting on the predictive power of neuroimaging. Future studies are indicated to further investigate these relationships, as well as to trial newer imaging modalities.
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Affiliation(s)
- Hasan S Ahmad
- Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
| | - Rachel Blue
- Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Sonia Ajmera
- Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Sabrina Heman-Ackah
- Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Michael Spadola
- Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Jillian W Lazor
- Department of Radiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - John Y K Lee
- Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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Al-Smair A, Mahmoud MM, Haj-Ahmad LM, Younes S, Saadeh A, Kakish E. Absent Meckel's cave as a possible cause of trigeminal neuralgia: A case report. Radiol Case Rep 2023; 18:1482-1484. [PMID: 36747907 PMCID: PMC9898280 DOI: 10.1016/j.radcr.2022.12.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 12/09/2022] [Indexed: 02/04/2023] Open
Abstract
Trigeminal neuralgia (TN) is a debilitating yet potentially treatable facial pain disorder.TN is difficult to miss clinically, as patients' clinical presentation is often strikingly stereotypical: unilateral, paroxysmal, stimulus-dependent pain involving the trigeminal territory. Magnetic resonance imaging (MRI), which is used for further evaluation of an underlying etiology of TN, most commonly shows neurovascular compression of the trigeminal nerve to be the culprit. Secondary etiologies, though less common, do exist. An absent Meckel's cave with ipsilateral TN was reported in a few case reports and series, and whether an etiological relationship exists is yet to be established. We herein present a case of a 22-year-old female patient who presented with typical TN clinical manifestations. MRI was ordered to assess for the underlying cause and an ipsilateral absent Meckel's cave was the only significant finding. This case report adds to the scarcity of literature highlighting this entity, further larger clinical studies are needed to establish a causal relationship.
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Affiliation(s)
- Ali Al-Smair
- Medray International Radiology Center, Amman, Jordan
| | | | | | - Sara Younes
- The University of Jordan, Faculty of Medicine, Amman, Jordan
| | - Ahmad Saadeh
- The University of Jordan, Faculty of Medicine, Amman, Jordan
- Corresponding author.
| | - Eid Kakish
- Medray International Radiology Center, Amman, Jordan
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23
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Abd-Elsayed A, Martens JM, Fiala KJ, Izuogu A. Pulsed Radiofrequency for the Treatment of Trigeminal Neuralgia. Curr Pain Headache Rep 2022; 26:889-894. [PMID: 36378398 DOI: 10.1007/s11916-022-01092-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/26/2022] [Indexed: 11/16/2022]
Abstract
PURPOSE OF REVIEW Trigeminal neuralgia is a sudden, unilateral, stabbing pain in the distribution of one or more branches of the fifth cranial nerve, with an overall prevalence ranging between 0.03 and 0.3%. While conservative treatments may offer temporary relief, many patients experience chronic headaches associated with their neuralgia. Invasive treatments are available for patients with intractable neuralgia; however, they may cause permanent tissue damage and often do not provide relief. This article examines pulsed radiofrequency (PRF) ablation (RFA) of the trigeminal nerve as a minimally invasive procedure that offers a promising alternative to invasive procedures for relief of trigeminal neuralgia while minimizing tissue damage. RECENT FINDINGS Efficacy of PRF and RFA in treating trigeminal neuralgia has been studied before, but literature lacks large size studies. The results of this retrospective study indicate that PRF can be used as a safe and effective treatment for patients suffering from trigeminal neuralgia that is refractory to conservative measures.
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Affiliation(s)
- Alaa Abd-Elsayed
- Department of Anesthesiology, School of Medicine and Public Health, University of Wisconsin, 600 Highland Avenue, Madison, WI, B6/319 CSC, USA.
| | - Joshua M Martens
- School of Medicine and Public Health, University of Wisconsin, WI, Madison, USA
| | - Kenneth J Fiala
- School of Medicine and Public Health, University of Wisconsin, WI, Madison, USA
| | - Angelica Izuogu
- School of Medicine and Public Health, University of Wisconsin, WI, Madison, USA
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24
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Mustafá ER, Gambeta E, Stringer RN, Souza IA, Zamponi GW, Weiss N. Electrophysiological and computational analysis of Ca v3.2 channel variants associated with familial trigeminal neuralgia. Mol Brain 2022; 15:91. [PMID: 36397158 PMCID: PMC9670400 DOI: 10.1186/s13041-022-00978-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Accepted: 11/02/2022] [Indexed: 11/18/2022] Open
Abstract
Trigeminal neuralgia (TN) is a rare form of chronic neuropathic pain characterized by spontaneous or elicited paroxysms of electric shock-like or stabbing pain in a region of the face. While most cases occur in a sporadic manner and are accompanied by intracranial vascular compression of the trigeminal nerve root, alteration of ion channels has emerged as a potential exacerbating factor. Recently, whole exome sequencing analysis of familial TN patients identified 19 rare variants in the gene CACNA1H encoding for Cav3.2T-type calcium channels. An initial analysis of 4 of these variants pointed to a pathogenic role. In this study, we assessed the electrophysiological properties of 13 additional TN-associated Cav3.2 variants expressed in tsA-201 cells. Our data indicate that 6 out of the 13 variants analyzed display alteration of their gating properties as evidenced by a hyperpolarizing shift of their voltage dependence of activation and/or inactivation resulting in an enhanced window current supported by Cav3.2 channels. An additional variant enhanced the recovery from inactivation. Simulation of neuronal electrical membrane potential using a computational model of reticular thalamic neuron suggests that TN-associated Cav3.2 variants could enhance neuronal excitability. Altogether, the present study adds to the notion that ion channel polymorphisms could contribute to the etiology of some cases of TN and further support a role for Cav3.2 channels.
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Affiliation(s)
- Emilio R. Mustafá
- grid.4491.80000 0004 1937 116XDepartment of Pathophysiology, Third Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Eder Gambeta
- grid.22072.350000 0004 1936 7697Department of Clinical Neurosciences, Alberta Children’s Hospital Research Institute, Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Canada
| | - Robin N. Stringer
- grid.4491.80000 0004 1937 116XDepartment of Pathophysiology, Third Faculty of Medicine, Charles University, Prague, Czech Republic ,grid.418095.10000 0001 1015 3316Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague, Czech Republic
| | - Ivana A. Souza
- grid.22072.350000 0004 1936 7697Department of Clinical Neurosciences, Alberta Children’s Hospital Research Institute, Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Canada
| | - Gerald W. Zamponi
- grid.22072.350000 0004 1936 7697Department of Clinical Neurosciences, Alberta Children’s Hospital Research Institute, Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Canada
| | - Norbert Weiss
- grid.4491.80000 0004 1937 116XDepartment of Pathophysiology, Third Faculty of Medicine, Charles University, Prague, Czech Republic
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25
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Xu R, Nair SK, Shah PP, Kannapadi N, Materi J, Alomari S, Kim T, Kalluri A, Xia Y, So RJ, Lim M, Bettegowda C. A Potential Role for Steroids in Acute Pain Management in Patients with Trigeminal Neuralgia. World Neurosurg 2022; 167:e1291-e1298. [PMID: 36113711 DOI: 10.1016/j.wneu.2022.09.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 09/03/2022] [Accepted: 09/05/2022] [Indexed: 11/21/2022]
Abstract
OBJECTIVE Effective therapies for acute pain management in trigeminal neuralgia (TN) are limited. We aimed to investigate the role of steroids in TN patients experiencing acute pain flares. METHODS We retrospectively reviewed patients presenting to the emergency department of a tertiary care institution between 2014 and 2020 for acute TN pain flares. Patients were divided into those who received steroids versus those who did not. Presenting characteristics, admission and surgical intervention rates, Barrow Neurological Institute pain scores, pain recurrence rates, and surgical intervention within 6 months of discharge were obtained for each patient. RESULTS Our cohort comprised 151 patients, of whom 40 (26.5%) received steroids before admission and/or discharge. These patients were less likely to undergo surgical intervention to treat acute pain (P = 0.023). Specifically, patients receiving steroids were less likely to undergo combined glycerin and radiofrequency rhizotomy compared with patients not receiving steroids (P = 0.012). Frequency and dosage of opioid administration did not differ between groups. The steroids group demonstrated a lower average Barrow Neurological Institute pain score on discharge compared with the no steroids group (P = 0.013). Patients receiving steroids for acute pain management were less likely to undergo surgical intervention within 6 months of discharge than patients who did not receive steroids (P = 0.033). CONCLUSIONS Steroid administration in patients with acute TN pain flares may reduce the likelihood of surgical intervention both during admission and within 6 months of discharge. Future prospective studies should examine the efficacy of steroids as an adjunctive medication in acute TN pain management.
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Affiliation(s)
- Risheng Xu
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Sumil K Nair
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Pavan P Shah
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Nivedha Kannapadi
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Joshua Materi
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Safwan Alomari
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Timothy Kim
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Anita Kalluri
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Yuanxuan Xia
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Raymond J So
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Michael Lim
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, California, USA
| | - Chetan Bettegowda
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
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26
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Zaher B, Bouzoubaa S, Ben Yahya I. Therapeutic management of carbamazepine's complications in front of essential trigeminal neuralgia. ADVANCES IN ORAL AND MAXILLOFACIAL SURGERY 2022. [DOI: 10.1016/j.adoms.2022.100372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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27
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Yazaki T, Kuroda H, Kimura M, Ohyama S, Ichinohe T, Shibukawa Y. Direct Mechanical Stimulation Mediates Cell-to-Cell Interactions in Cultured Trigeminal Ganglion Cells. THE BULLETIN OF TOKYO DENTAL COLLEGE 2022; 63:109-117. [PMID: 35965080 DOI: 10.2209/tdcpublication.2021-0034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Trigeminal neuralgia occurs in the orofacial region, characteristically causing pain that feels like a transient electric shock. Some histopathological studies have reported that trigeminal neuralgia is caused by mechanical compression of the demyelinated trigeminal nerve; the pathophysiological mechanism behind this phenomenon remains to be clarified, however. Cell-cell interactions have also been reported to be involved in the development and modulation of some types of neuropathic pain. The purpose of this study was to investigate the potential contribution of cell-cell interactions to trigeminal neuralgia by measuring intracellular free Ca2+ concentrations ([Ca2+]i) in primary cultured trigeminal ganglion (TG) cells. Direct mechanical stimulation of TG cells induced an increase in [Ca2+]i in both neuronal and non-neuronal cells, such as glial cells. Moreover, this increase was stimulus intensity-dependent and non-desensitizing. Direct mechanical stimulation increased [Ca2+]i in neighboring cells as well, and this increase was inhibited by application of carbamazepine. These results indicate that direct mechanical stimulation affects Ca2+ signaling. Trigeminal ganglion cells establish intercellular networks between themselves, suggesting that this is involved in the development and generation of trigeminal neuralgia.
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Affiliation(s)
- Tatsuhiko Yazaki
- Department of Physiology, Tokyo Dental College.,Department of Dental Anesthesiology, Tokyo Dental College
| | - Hidetaka Kuroda
- Department of Physiology, Tokyo Dental College.,Department of Dental Anesthesiology, Kanagawa Dental University
| | - Maki Kimura
- Department of Physiology, Tokyo Dental College
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28
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Schürer Q, Shaban H, Gantenbein AR, Todeschini G, Pradhan SK. Ashi Scalp Acupuncture in the Treatment of Secondary Trigeminal Neuralgia Induced by Multiple Sclerosis: A Case Report. MEDICINES 2022; 9:medicines9080044. [PMID: 36005649 PMCID: PMC9414573 DOI: 10.3390/medicines9080044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 08/05/2022] [Accepted: 08/10/2022] [Indexed: 11/25/2022]
Abstract
Background: Multiple sclerosis (MS) is an autoimmune, chronic, inflammatory, demyelinating, and axonal degeneration disease of the central nervous system. Trigeminal neuralgia (TN), a neuropathic facial paroxysmal pain, is prevalent among MS patients. Because of the inadequacy of the comprehension of MS-related TN pathophysiological mechanisms, TN remains arduous in its treatment approaches. Acupuncture as a non-pharmacological therapy could be a promising complementary therapy for the treatment of TN. MS gradual neural damage might affect the muscles’ function. This can lead to acute or paroxysmal pain in the form of spasms that might progress to formation of myofascial trigger points also known in traditional Chinese medicine as Ashi points (AP). Localising these AP through palpation and pain sensation feedback in patients with MS is an indicator of disease progression. Pathologically, these points reveal the disharmony of soft tissue and internal organs. Methods: This case report examined the pain relief outcome with Ashi scalp acupuncture (ASA) in a secondary TN patient who was unsuccessfully treated multiple times with body acupuncture. The main outline measure was to quantify pain intensity using a numerical rating scale (NRS) before and after each acupuncture therapy. The patient was treated on the scalp for a total of eight times, twice a week over four weeks. Results: A reduction in secondary TN pain intensity was observed after each session. On average, the patient expressed severe pain (NRS: 8.0 ± 2.20) before ASA treatment, which significantly decreased after therapy to mild pain (NRS: 2.0 ± 1.64). Conclusions: Significant improvements in pain intensity reduction after each acupuncture treatment without any adverse effects were observed.
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Affiliation(s)
- Qiong Schürer
- Research Department, Swiss TCM UNI, 5330 Bad Zurzach, Switzerland
| | - Hamdy Shaban
- Department of Psychiatry Private Clinic of UPK, The University Psychiatric Clinics, 4002 Basel, Switzerland
| | - Andreas R. Gantenbein
- Neurology & Neurorehabilitation Department Rehaklinik, ZURZACH Care, 5300 Bad Zurzach, Switzerland
| | - Giada Todeschini
- Neurology & Neurorehabilitation Department Rehaklinik, ZURZACH Care, 5300 Bad Zurzach, Switzerland
| | - Saroj K. Pradhan
- Research Department, Swiss TCM UNI, 5330 Bad Zurzach, Switzerland
- Research Department Rehaklinik Bad Zurzach, TCM Ming Dao Bad Zurzach/ZURZACH Care, 5330 Bad Zurzach, Switzerland
- Correspondence: ; Tel.: +41-56-269-5684
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29
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Raman S, Waskitho A, Raju R, Iwasa T, Ikutame D, Okura K, Oshima M, Matsuka Y. Analgesic Effect of Tranilast in an Animal Model of Neuropathic Pain and Its Role in the Regulation of Tetrahydrobiopterin Synthesis. Int J Mol Sci 2022; 23:5878. [PMID: 35682555 PMCID: PMC9180260 DOI: 10.3390/ijms23115878] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 05/16/2022] [Accepted: 05/22/2022] [Indexed: 11/17/2022] Open
Abstract
Trigeminal neuralgia is unilateral, lancinating, episodic pain that can be provoked by routine activities. Anticonvulsants, such as carbamazepine, are the drugs of choice; however, these possess side-effects. Microvascular decompression is the most effective surgical technique with a higher success rate, although occasionally causes adverse effects. The potential treatment for this type of pain remains unmet. Increased tetrahydrobiopterin (BH4) levels have been reported in association with axonal injury. This study aimed to evaluate the effect of tranilast on relieving neuropathic pain in animal models and analyze the changes in BH4 synthesis. Neuropathic pain was induced via infraorbital nerve constriction. Tranilast, carbamazepine, or saline was injected intraperitoneally to assess the rat's post-intervention pain response. In the von Frey's test, the tranilast and carbamazepine groups showed significant changes in the head withdrawal threshold in the ipsilateral whisker pad area. The motor coordination test showed no changes in the tranilast group, whereas the carbamazepine group showed decreased performance, indicating impaired motor coordination. Trigeminal ganglion tissues were used for the PCR array analysis of genes that regulate the BH4 pathway. Downregulation of the sepiapterin reductase (Spr) and aldoketo reductase (Akr) genes after tranilast injection was observed compared to the pain model. These findings suggest that tranilast effectively treats neuropathic pain.
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Affiliation(s)
- Swarnalakshmi Raman
- Department of Stomatognathic Function and Occlusal Reconstruction, Graduate School of Biomedical Sciences, Tokushima University, Tokushima 770-8504, Japan; (S.R.); (A.W.); (T.I.); (D.I.); (K.O.); (M.O.)
| | - Arief Waskitho
- Department of Stomatognathic Function and Occlusal Reconstruction, Graduate School of Biomedical Sciences, Tokushima University, Tokushima 770-8504, Japan; (S.R.); (A.W.); (T.I.); (D.I.); (K.O.); (M.O.)
| | - Resmi Raju
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, MD 20892, USA;
| | - Takuma Iwasa
- Department of Stomatognathic Function and Occlusal Reconstruction, Graduate School of Biomedical Sciences, Tokushima University, Tokushima 770-8504, Japan; (S.R.); (A.W.); (T.I.); (D.I.); (K.O.); (M.O.)
| | - Daisuke Ikutame
- Department of Stomatognathic Function and Occlusal Reconstruction, Graduate School of Biomedical Sciences, Tokushima University, Tokushima 770-8504, Japan; (S.R.); (A.W.); (T.I.); (D.I.); (K.O.); (M.O.)
| | - Kazuo Okura
- Department of Stomatognathic Function and Occlusal Reconstruction, Graduate School of Biomedical Sciences, Tokushima University, Tokushima 770-8504, Japan; (S.R.); (A.W.); (T.I.); (D.I.); (K.O.); (M.O.)
| | - Masamitsu Oshima
- Department of Stomatognathic Function and Occlusal Reconstruction, Graduate School of Biomedical Sciences, Tokushima University, Tokushima 770-8504, Japan; (S.R.); (A.W.); (T.I.); (D.I.); (K.O.); (M.O.)
| | - Yoshizo Matsuka
- Department of Stomatognathic Function and Occlusal Reconstruction, Graduate School of Biomedical Sciences, Tokushima University, Tokushima 770-8504, Japan; (S.R.); (A.W.); (T.I.); (D.I.); (K.O.); (M.O.)
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30
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Munoz A, Maxwell C, Gofman N, Liebman K, Veznedaroglu E. The management of trigeminal neuralgia with triptans, a narrative review of the literature. Headache 2022; 62:543-547. [DOI: 10.1111/head.14321] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 04/11/2022] [Accepted: 04/11/2022] [Indexed: 01/05/2023]
Affiliation(s)
- Alfredo Munoz
- Drexel University College of Medicine Philadelphia Pennsylvania USA
| | | | - Natalie Gofman
- Global Neurosciences Institute Pennington New Jersey USA
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31
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Bai J, Zhou Y, Song G, Ren J, Xiao X. Drilling off the Petrosal Apex and Opening the Upper Wall of Meckel's Cave Are the Key Elements of Good Outcomes in the Treatment of Trigeminal Neuralgia Secondary to Petrous Apex Meningioma. J Korean Neurosurg Soc 2022; 65:479-488. [PMID: 35286800 PMCID: PMC9082127 DOI: 10.3340/jkns.2021.0060] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 05/21/2021] [Indexed: 11/27/2022] Open
Abstract
Objective The surgical management of trigeminal neuralgia (TN) caused by petrous apex meningioma (PAM) is still a challenge because of the lesion’s deep location and the surrounding complex structures. The authors describe the intradural anterior transpetrosal approach (ATPA) and its effect on the treatment of TN secondary to PAM.
Methods A retrospective analysis of 15 patients with TN secondary to PAM who underwent surgery via the intradural ATPA was conducted. The key techniques, which included drilling off the petrosal apex (PA) and opening the upper wall of Meckel’s cave (MC), are described in detail.
Results Total removal of the tumor and complete pain relief (Barrow Neurological Institute I) were achieved in all 15 patients without significant morbidity. Five patients developed new facial numbness postoperatively, which disappeared within three months after surgery. The postoperative magnetic resonance imaging showed temporal lobe swelling in three patients, but no clinical symptoms. One patient had cerebrospinal fluid leakage and was managed with bed rest and temporary lumbar drainage. One patient had an intracranial infection and was treated with antibiotics. By the last follow up, no patients had pain relapse or/and tumor recurrence. It is worth noting that the vascular compression at the root of the trigeminal nerve was found in one patient during the operation.
Conclusion Our experience suggests that drilling off the PA and opening the upper wall of the MC are key elements for a good outcome of the treatment of TN secondary to PAM. The intradural ATPA has the advantages for both tumor resection and pain relief.
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Affiliation(s)
- Jie Bai
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Yufan Zhou
- Department of Neurosurgery, Fuzhou First People's Hospital, Fifth Affiliated Hospital of Nanchang University, Nanchang, China
| | - Gang Song
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Jian Ren
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Xinru Xiao
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
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32
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Lin J, Mou L, Yan Q, Ma S, Yue X, Zhou S, Lin Z, Zhang J, Liu J, Zhao Y. Automated Segmentation of Trigeminal Nerve and Cerebrovasculature in MR-Angiography Images by Deep Learning. Front Neurosci 2021; 15:744967. [PMID: 34955711 PMCID: PMC8702731 DOI: 10.3389/fnins.2021.744967] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 11/17/2021] [Indexed: 11/29/2022] Open
Abstract
Trigeminal neuralgia caused by paroxysmal and severe pain in the distribution of the trigeminal nerve is a rare chronic pain disorder. It is generally accepted that compression of the trigeminal root entry zone by vascular structures is the major cause of primary trigeminal neuralgia, and vascular decompression is the prior choice in neurosurgical treatment. Therefore, accurate preoperative modeling/segmentation/visualization of trigeminal nerve and its surrounding cerebrovascular is important to surgical planning. In this paper, we propose an automated method to segment trigeminal nerve and its surrounding cerebrovascular in the root entry zone, and to further reconstruct and visual these anatomical structures in three-dimensional (3D) Magnetic Resonance Angiography (MRA). The proposed method contains a two-stage neural network. Firstly, a preliminary confidence map of different anatomical structures is produced by a coarse segmentation stage. Secondly, a refinement segmentation stage is proposed to refine and optimize the coarse segmentation map. To model the spatial and morphological relationship between trigeminal nerve and cerebrovascular structures, the proposed network detects the trigeminal nerve, cerebrovasculature, and brainstem simultaneously. The method has been evaluated on a dataset including 50 MRA volumes, and the experimental results show the state-of-the-art performance of the proposed method with an average Dice similarity coefficient, Hausdorff distance, and average surface distance error of 0.8645, 0.2414, and 0.4296 on multi-tissue segmentation, respectively.
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Affiliation(s)
- Jinghui Lin
- Department of Neurosurgery, Ningbo First Hospital, Ningbo, China
| | - Lei Mou
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Qifeng Yan
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, China
| | - Shaodong Ma
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, China
| | - Xingyu Yue
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, China
| | - Shengjun Zhou
- Department of Neurosurgery, Ningbo First Hospital, Ningbo, China
| | - Zhiqing Lin
- Department of Neurosurgery, Ningbo First Hospital, Ningbo, China
| | - Jiong Zhang
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, China
| | - Jiang Liu
- Department of Computer Science and Engineering, Southern University of Science and Technology, Shenzhen, China
| | - Yitian Zhao
- The Affiliated People's Hospital of Ningbo University, Ningbo, China.,Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, China
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33
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Ishak FH, Yusof Khan AHK, Mohd Yaakob MN, Al Khafiz Kamis MF, Abdul Rashid AM, Loh WC, Baharin J, Ibrahim A, Inche Mat LN, Wan Sulaiman WA, Hoo FK, Basri H. Giant intracavernous aneurysm presenting with isolated trigeminal neuralgia: a case report. THE EGYPTIAN JOURNAL OF NEUROLOGY, PSYCHIATRY AND NEUROSURGERY 2021. [DOI: 10.1186/s41983-021-00365-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Trigeminal neuralgia (TN) commonly affects individuals aged more than 50 years and is mostly primary owing to trigeminal nerve neurovascular compression. We report a case of secondary TN attributed to a giant intracavernous aneurysm compressing the trigeminal nerve.
Case presentation
A 74-year-old female presented with classic TN symptoms, which were initially refractory to medical treatment. Imaging including MRI brain, MR angiography, and cerebral angiogram revealed a giant intracavernous aneurysm measuring 1.7 cm × 2.8 cm, inducing mass effect on the left Meckel's cave. Aneurysm embolization was challenging due to the difficult cannulation of the distal portion of the aneurysm. The patient opted for conservative management with mild improvement of symptoms.
Conclusions
Intracavernous aneurysm rarely present with isolated trigeminal neuralgia. This case report emphasizes that the assessment of the intracranial vasculature should be considered as part of the diagnostic imaging work-up for patients presenting with TN
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34
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Bisla S, Gupta A, Agarwal S, Singh H, Sehrawat A, Singh A. Evaluation of transcutaneous electrical nerve stimulation as an adjunct therapy in trigeminal neuralgia - a randomized double-blind placebo-controlled clinical study. J Dent Anesth Pain Med 2021; 21:565-574. [PMID: 34909474 PMCID: PMC8637911 DOI: 10.17245/jdapm.2021.21.6.565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 09/12/2021] [Accepted: 10/22/2021] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Trigeminal neuralgia (TN) is a severe form of pain that affects the daily activities of a patient. Transcutaneous electrical nerve stimulation (TENS) therapy is an emerging option for the treatment of acute and chronic pain. The aim of this study was to evaluate the effect of TENS therapy as an adjunct to drug therapy for the treatment of TN. METHODS A total of 52 patients diagnosed with TN according to the International Classification of Headache Disorders (version 3) were included. Each patient was randomized to either the TENS or placebo TENS groups. Intervention was given in continuous mode and 100-Hz frequency for 20 mins biweekly for 6 weeks. Parameters were measured at baseline, TENS completion and 3 months, 6 months, and 1 year of follow up. The parameters observed were mean carbamazepine dose, mean visual analog scale (VAS) score, mean present pain intensity (PPI) score, and functional outcome. Non-parametric analyses, one-way ANOVA and the Kruskal-Wallis test were applied for intragroup comparisons, while the Mann-Whitney U test and independent t-test were used for intergroup comparisons of variables. The chi-square test was applied to analyze categorical data. RESULTS Compared to the placebo TENS group, the mean dose of carbamazepine in the TENS group was significantly reduced at TENS completion, as well as at 6 months and 1 year follow up. Changes in mean VAS score, mean PPI score, and functional outcome did not show significant differences between the groups (P>0.05). CONCLUSION TENS therapy does not lead to any changes in pain levels but it may reduce the mean dose of carbamazepine when used as an adjunct treatment in patients with TN.
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Affiliation(s)
- Suman Bisla
- Department of Oral Medicine and Radiology, Post Graduate Institute of Dental Sciences, Rohtak, Haryana, India
| | - Ambika Gupta
- Department of Oral Medicine and Radiology, Post Graduate Institute of Dental Sciences, Rohtak, Haryana, India
| | - Shalini Agarwal
- Department of Radio-diagnosis, Post Graduate Institute of Medical Sciences, Rohtak, Haryana, India
| | - Harneet Singh
- Department of Oral Medicine and Radiology, Post Graduate Institute of Dental Sciences, Rohtak, Haryana, India
| | - Ankita Sehrawat
- Department of Oral Medicine and Radiology, Post Graduate Institute of Dental Sciences, Rohtak, Haryana, India
| | - Aarti Singh
- Department of Oral Medicine and Radiology, Post Graduate Institute of Dental Sciences, Rohtak, Haryana, India
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35
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Xu R, Xie ME, Jackson CM. Trigeminal Neuralgia: Current Approaches and Emerging Interventions. J Pain Res 2021; 14:3437-3463. [PMID: 34764686 PMCID: PMC8572857 DOI: 10.2147/jpr.s331036] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Accepted: 09/13/2021] [Indexed: 12/22/2022] Open
Abstract
Trigeminal neuralgia (TN) has been described in the literature as one of the most debilitating presentations of orofacial pain. This review summarizes over 150 years of collective clinical experience in the medical and surgical treatment of TN. Fundamentally, TN remains a clinical diagnosis that must be distinguished from other types of trigeminal neuropathic pain and/or facial pain associated with other neuralgias or headache syndromes. What is increasingly clear is that there is no catch-all medical or surgical intervention that is effective for all patients with trigeminal neuralgia, likely reflective of the fact that TN is likely a heterogenous group of disorders that jointly manifests in facial pain. The first-line treatment for TN remains anticonvulsant medical therapy. Patients who fail this have a range of surgical options available to them. In general, microvascular decompression is a safe and effective procedure with immediate and durable outcomes. Patients who are unable to tolerate general anesthesia or whose medical comorbidities preclude a suboccipital craniectomy may benefit from percutaneous methodologies including glycerol or radiofrequency ablation, or both. For patients with bleeding diathesis due to blood thinning medications who are ineligible for invasive procedures, or for those who are unwilling to undergo open surgical procedures, radiosurgery may be an excellent option-provided the patient understands that maximum pain relief will take on the order of months to achieve. Finally, peripheral neurectomies continue to provide an inexpensive and resource-sparing alternative to pain relief for patients in locations with limited economic and medical resources. Ultimately, elucidation of the molecular mechanisms underlying trigeminal neuralgia will pave the way for novel, more effective and less invasive therapies.
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Affiliation(s)
- Risheng Xu
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Michael E Xie
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Christopher M Jackson
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
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36
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Danyluk H, Lang S, Monchi O, Sankar T. Pre-operative Limbic System Functional Connectivity Distinguishes Responders From Non-responders to Surgical Treatment for Trigeminal Neuralgia. Front Neurol 2021; 12:716500. [PMID: 34671309 PMCID: PMC8520903 DOI: 10.3389/fneur.2021.716500] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 08/31/2021] [Indexed: 11/13/2022] Open
Abstract
Background: Trigeminal neuralgia (TN) is a severe facial pain condition often requiring surgical treatment. Unfortunately, even technically successful surgery fails to achieve durable pain relief in many patients. The purpose of this study was to use resting-state functional magnetic resonance imaging (fMRI) to: (1) compare functional connectivity between limbic and accessory sensory networks in TN patients vs. healthy controls; and (2) determine if pre-operative variability in these networks can distinguish responders and non-responders to surgery for TN. Methods: We prospectively recruited 22 medically refractory classic or idiopathic TN patients undergoing surgical treatment over a 3-year period, and 19 age- and sex-matched healthy control subjects. fMRI was acquired within the month prior to surgery for all TN patients and at any time during the study period for controls. Functional connectivity analysis was restricted to six pain-relevant brain regions selected a priori: anterior cingulate cortex (ACC), posterior cingulate cortex, hippocampus, amygdala, thalamus, and insula. Two comparisons were performed: (1) TN vs. controls; and (2) responders vs. non-responders to surgical treatment for TN. Functional connectivity was assessed with a two-sample t-test, using a statistical significance threshold of p < 0.050 with false discovery rate (FDR) correction for multiple comparisons. Results: Pre-operative functional connectivity was increased in TN patients compared to controls between the right insular cortex and both the left thalamus [t (39) = 3.67, p = 0.0007] and right thalamus [t (39) = 3.22, p = 0.0026]. TN patients who were non-responders to surgery displayed increased functional connectivity between limbic structures, including between the left and right hippocampus [t (18) = 2.85, p = 0.0106], and decreased functional connectivity between the ACC and both the left amygdala [t (18) = 2.94, p = 0.0087] and right hippocampus [t (18) = 3.20, p = 0.0049]. Across all TN patients, duration of illness was negatively correlated with connectivity between the ACC and left amygdala (r 2 = 0.34, p = 0.00437) as well as the ACC and right hippocampus (r 2 = 0.21, p = 0.0318). Conclusions: TN patients show significant functional connectivity abnormalities in sensory-salience regions. However, variations in the strength of functional connectivity in limbic networks may explain why some TN patients fail to respond adequately to surgery.
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Affiliation(s)
- Hayden Danyluk
- Division of Surgical Research, University of Alberta, Edmonton, AB, Canada.,Division of Neurosurgery, Department of Surgery, University of Alberta, Edmonton, AB, Canada
| | - Stefan Lang
- Department of Clinical Neurosciences, University of Calgary, Calgary, AB, Canada.,Health Research Innovation Centre, Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
| | - Oury Monchi
- Department of Clinical Neurosciences, University of Calgary, Calgary, AB, Canada.,Health Research Innovation Centre, Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
| | - Tejas Sankar
- Division of Neurosurgery, Department of Surgery, University of Alberta, Edmonton, AB, Canada
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Alper J, Seifert AC, Verma G, Huang KH, Jacob Y, Al Qadi A, Rutland JW, Patel S, Bederson J, Shrivastava RK, Delman BN, Balchandani P. Leveraging high-resolution 7-tesla MRI to derive quantitative metrics for the trigeminal nerve and subnuclei of limbic structures in trigeminal neuralgia. J Headache Pain 2021; 22:112. [PMID: 34556025 PMCID: PMC8461944 DOI: 10.1186/s10194-021-01325-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 09/07/2021] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Trigeminal Neuralgia (TN) is a chronic neurological disease that is strongly associated with neurovascular compression (NVC) of the trigeminal nerve near its root entry zone. The trigeminal nerve at the site of NVC has been extensively studied but limbic structures that are potentially involved in TN have not been adequately characterized. Specifically, the hippocampus is a stress-sensitive region which may be structurally impacted by chronic TN pain. As the center of the emotion-related network, the amygdala is closely related to stress regulation and may be associated with TN pain as well. The thalamus, which is involved in the trigeminal sensory pathway and nociception, may play a role in pain processing of TN. The objective of this study was to assess structural alterations in the trigeminal nerve and subregions of the hippocampus, amygdala, and thalamus in TN patients using ultra-high field MRI and examine quantitative differences in these structures compared with healthy controls. METHODS Thirteen TN patients and 13 matched controls were scanned at 7-Tesla MRI with high resolution, T1-weighted imaging. Nerve cross sectional area (CSA) was measured and an automated algorithm was used to segment hippocampal, amygdaloid, and thalamic subregions. Nerve CSA and limbic structure subnuclei volumes were compared between TN patients and controls. RESULTS CSA of the posterior cisternal nerve on the symptomatic side was smaller in patients (3.75 mm2) compared with side-matched controls (5.77 mm2, p = 0.006). In TN patients, basal subnucleus amygdala volume (0.347 mm3) was reduced on the symptomatic side compared with controls (0.401 mm3, p = 0.025) and the paralaminar subnucleus volume (0.04 mm3) was also reduced on the symptomatic side compared with controls (0.05 mm3, p = 0.009). The central lateral thalamic subnucleus was larger in TN patients on both the symptomatic side (0.033 mm3) and asymptomatic side (0.035 mm3), compared with the corresponding sides in controls (0.025 mm3 on both sides, p = 0.048 and p = 0.003 respectively). The inferior and lateral pulvinar thalamic subnuclei were both reduced in TN patients on the symptomatic side (0.2 mm3 and 0.17 mm3 respectively) compared to controls (0.23 mm3, p = 0.04 and 0.18 mm3, p = 0.04 respectively). No significant findings were found in the hippocampal subfields analyzed. CONCLUSIONS These findings, generated through a highly sensitive 7 T MRI protocol, provide compelling support for the theory that TN neurobiology is a complex amalgamation of local structural changes within the trigeminal nerve and structural alterations in subnuclei of limbic structures directly and indirectly involved in nociception and pain processing.
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Affiliation(s)
- Judy Alper
- BioMedical Engineering and Imaging Institute, Icahn School of Medicine at Mount Sinai, 1470 Madison Avenue; Floor 1, New York, NY, 10029, USA.
- Department of Biomedical Engineering, City College of New York, New York, NY, USA.
| | - Alan C Seifert
- BioMedical Engineering and Imaging Institute, Icahn School of Medicine at Mount Sinai, 1470 Madison Avenue; Floor 1, New York, NY, 10029, USA
| | - Gaurav Verma
- BioMedical Engineering and Imaging Institute, Icahn School of Medicine at Mount Sinai, 1470 Madison Avenue; Floor 1, New York, NY, 10029, USA
| | - Kuang-Han Huang
- BioMedical Engineering and Imaging Institute, Icahn School of Medicine at Mount Sinai, 1470 Madison Avenue; Floor 1, New York, NY, 10029, USA
| | - Yael Jacob
- BioMedical Engineering and Imaging Institute, Icahn School of Medicine at Mount Sinai, 1470 Madison Avenue; Floor 1, New York, NY, 10029, USA
| | - Ameen Al Qadi
- BioMedical Engineering and Imaging Institute, Icahn School of Medicine at Mount Sinai, 1470 Madison Avenue; Floor 1, New York, NY, 10029, USA
| | - John W Rutland
- BioMedical Engineering and Imaging Institute, Icahn School of Medicine at Mount Sinai, 1470 Madison Avenue; Floor 1, New York, NY, 10029, USA
| | - Sheetal Patel
- Department of Neurosurgery, Mount Sinai Hospital, New York, NY, USA
| | - Joshua Bederson
- Department of Neurosurgery, Mount Sinai Hospital, New York, NY, USA
| | | | - Bradley N Delman
- Department of Diagnostic, Molecular, and Interventional Radiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Priti Balchandani
- BioMedical Engineering and Imaging Institute, Icahn School of Medicine at Mount Sinai, 1470 Madison Avenue; Floor 1, New York, NY, 10029, USA
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Singh D, Dutta G, Jagetia A, Singh H, Srivastava AK, Tandon M, Ganjoo P. Microvascular Decompression for Trigeminal Neuralgia: Experience of a Tertiary Care Center in India and a Brief Review of Literature. Neurol India 2021; 69:S206-S212. [PMID: 34003167 DOI: 10.4103/0028-3886.315975] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background Trigeminal neuralgia (TN) is a devastating condition causing significant patient discomfort and morbidity hampering quality of life. Of the many treatment options available, microvascular decompression (MVD) of the trigeminal nerve is widely performed. However, the procedure is not risk-free. Objective The study aimed to describe our experience of treating TN via MVD and long-term follow-up of the patients treated by this modality. Materials and Methods It is a 5-year retrospective analysis of the database of patients with idiopathic TN treated with MVD at our institute. A total of 106 patients fulfilling the criteria of idiopathic TN by International Classification of Headache Disorders, 3rd ed.ition and available for follow-up for at least 1-year post-procedure were included in the study. Results Of the 106 patients, 58 (54.7%) were female and 48 (45.3%) were male with a mean age of 55 years (range 22-75 years). Vascular compression of the trigeminal nerve was seen in all cases; arterial compression in 82%, both artery and vein 14.5% while unidentified vessels were the culprit in 3.8% of the patients. There were no intra- or post-operative deaths. The best response was achieved at 1 month following the procedure where 85% of the patients achieved excellent outcomes. Conclusion In experienced hands, MVD is still a safe and cost-effective modality over a myriad of treatment options available for TN in patients of all ages. The absence of adhesions, indentations, and distortion of the trigeminal nerve are positive predictors of excellent outcomes in the long run.
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Affiliation(s)
- Daljit Singh
- Department of Neuro-Surgery, Govind Ballabh Pant Institute of Postgraduate Medical Education and Research, New Delhi, India
| | - Gautam Dutta
- Department of Neuro-Surgery, Rajendra Institute of Medical Sciences, Ranchi, Jharkhand, India
| | - Anita Jagetia
- Department of Neuro-Surgery, Govind Ballabh Pant Institute of Postgraduate Medical Education and Research, New Delhi, India
| | - Hukum Singh
- Department of Neuro-Surgery, Govind Ballabh Pant Institute of Postgraduate Medical Education and Research, New Delhi, India
| | - Arvind K Srivastava
- Department of Neuro-Surgery, Govind Ballabh Pant Institute of Postgraduate Medical Education and Research, New Delhi, India
| | - Monica Tandon
- Department of Anesthesia, Govind Ballabh Pant Institute of Postgraduate Medical Education and Research, New Delhi, India
| | - Pragati Ganjoo
- Department of Anesthesia, Govind Ballabh Pant Institute of Postgraduate Medical Education and Research, New Delhi, India
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Abstract
Background Trigeminal neuralgia (TN) is a painful condition, often leading to poor quality of life. Objective The aim of this review was to discuss the various treatment modalities for the medical management of TN. Materials and Methods We reviewed the available literature on TN in clinical databases including PubMed, Google Scholar, and the Cochrane Database of Systematic Reviews, with a specific focus on the pharmacological treatment and newer drugs under development for the treatment of TN. Results Carbamazepine (CBZ) is the gold standard of treatment for TN. The first-line drugs for the treatment of TN are CBZ and oxcarbazepine (OXC). A proportion of cases (30%) are initially resistant to the first-line drugs. Alternative drugs need to be considered if the first-line drugs are not well tolerated or become ineffective with prolonged therapy. The second-line drugs comprise lamotrigine, baclofen, gabapentin, and pregabalin used as monotherapy or in combination with CBZ/OXC. Botulinum toxin A may be a promising presurgical option. Newer drug like vixotrigine has shown good results in phase two randomized control trials. About 50% of cases develop treatment resistance to oral drugs over the subsequent years of therapy and require surgical options. Conclusion The first-line drugs for the treatment of TN (irrespective of the age group or type) are CBZ and OXC. Combination therapy with second-line or other drugs may become necessary with poor response to CBZ/OXC, or if adverse events occur. Patients should be offered surgical options if there is poor response or tolerance to the medical therapy.
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Affiliation(s)
- Satish V Khadilkar
- Department of Neurology, Bombay Hospital Institute of Medical Sciences, New Marine Lines, Mumbai, Maharashtra, India
| | - Varsha A Patil
- Associate Consultant Neurologist , Bombay Hospital Institute of Medical Sciences, New Marine Lines, Mumbai, Maharashtra, India
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Tohyama S, Walker MR, Zhang JY, Cheng JC, Hodaie M. Brainstem trigeminal fiber microstructural abnormalities are associated with treatment response across subtypes of trigeminal neuralgia. Pain 2021; 162:1790-1799. [PMID: 33306503 PMCID: PMC8120686 DOI: 10.1097/j.pain.0000000000002164] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 10/29/2020] [Accepted: 11/17/2020] [Indexed: 01/03/2023]
Abstract
ABSTRACT Neurosurgical treatments for trigeminal neuralgia (TN) can provide long-lasting pain relief; however, some patients fail to respond and undergo multiple, repeat procedures. Surgical outcomes can vary depending on the type of TN, but the reasons for this are not well understood. Neuroimaging studies of TN point to abnormalities in the brainstem trigeminal fibers; however, whether this is a common characteristic of treatment nonresponse across different subtypes of TN is unknown. Here, we used diffusion tensor imaging (DTI) to determine whether the brainstem trigeminal fiber microstructure is a common biomarker of surgical response in TN and whether the extent of these abnormalities is associated with the likelihood of response across subtypes of TN. We studied 98 patients with TN (61 classical TN, 26 TN secondary to multiple sclerosis, and 11 TN associated with a solitary pontine lesion) who underwent neurosurgical treatment and 50 healthy controls. We assessed treatment response using pain intensity measures and examined microstructural features by extracting pretreatment DTI metrics from the proximal pontine segment of the trigeminal nerves. We found that microstructural abnormalities in the affected pontine trigeminal fibers (notably, lower fractional anisotropy and higher radial diffusivity) highlight treatment nonresponders (n = 47) compared with responders (n = 51) and controls, and that the degree of abnormalities is associated with the likelihood of surgical response across subtypes of TN. These novel findings demonstrate the value of DTI as an objective, noninvasive tool for the prediction of treatment response and elucidate the features that distinguish treatment responders from nonresponders in the TN population.
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Affiliation(s)
- Sarasa Tohyama
- Division of Brain, Imaging, and Behaviour—Systems Neuroscience, Krembil Research Institute, Toronto Western Hospital, University Health Network, Toronto, ON, Canada
- Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Matthew R. Walker
- Division of Brain, Imaging, and Behaviour—Systems Neuroscience, Krembil Research Institute, Toronto Western Hospital, University Health Network, Toronto, ON, Canada
| | - Jia Y. Zhang
- Division of Brain, Imaging, and Behaviour—Systems Neuroscience, Krembil Research Institute, Toronto Western Hospital, University Health Network, Toronto, ON, Canada
| | - Joshua C. Cheng
- Stony Brook University School of Medicine, Stony Brook, NY, United States
| | - Mojgan Hodaie
- Division of Brain, Imaging, and Behaviour—Systems Neuroscience, Krembil Research Institute, Toronto Western Hospital, University Health Network, Toronto, ON, Canada
- Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
- Department of Surgery, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
- Division of Neurosurgery, Krembil Neuroscience Centre, Toronto Western Hospital, University Health Network, Toronto, ON, Canada
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Ala M, Ghasemi M, Mohammad Jafari R, Dehpour AR. Beyond its anti-migraine properties, sumatriptan is an anti-inflammatory agent: A systematic review. Drug Dev Res 2021; 82:896-906. [PMID: 33792938 DOI: 10.1002/ddr.21819] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 03/15/2021] [Accepted: 03/17/2021] [Indexed: 02/06/2023]
Abstract
Sumatriptan is the first available medication from triptans family that was approved by the U.S. Food and Drug Administration for migraine attacks and cluster headaches in 1991. Most of its action is mediated by selective 5-HT1B/1D receptor agonism. Recent investigations raised the possibility of repositioning of this drug to other indications beyond migraine, as increasing evidence suggests for an anti-inflammatory property of sumatriptan. We performed a literature search using PubMed, Web of Science, Scopus, and Google Scholar using "inflammation AND sumatriptan" or "inflammation AND 5HT1B/D" as the keywords. Then, articles were screened for their relevance and those directly discussing the correlation between inflammation and sumatriptan or 5HT1B/D were included. Total references reviewed or inclusion/exclusion were 340 retrieved full-text articles (n = 340), then based on critical assessment 66 of them were included in this systematic review. Our literature review indicates that at low doses, sumatriptan can reduce inflammatory markers (e.g., interleukin-1β, tumor necrosis factor-α, and nuclear factor-κB), affects caspases and changes cells lifespan. Additionally, nitric oxide synthase and nitric oxide signaling seem to be regulated by this drug. It also inhibits the release of calcitonin gene-related peptide. Sumatriptan protects against many inflammatory conditions including cardiac and mesenteric ischemia/reperfusion, skin flap, pruritus, peripheral, and central nervous system injuries such as spinal cord injury, testicular torsion-detorsion, oral mucositis, and other experimental models. Considering the safety and potency of low dose sumatriptan compared to corticosteroids and other immunosuppressive medications, it is worth to take advantage of sumatriptan in inflammatory conditions.
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Affiliation(s)
- Moein Ala
- Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Mehdi Ghasemi
- Department of Neurology, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Razieh Mohammad Jafari
- Experimental Medicine Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Ahmad Reza Dehpour
- Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.,Experimental Medicine Research Center, Tehran University of Medical Sciences, Tehran, Iran
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Chaves JPG, DE Oliveira TVHF, Francisco AN, Trintinalha MDO, Carvalho NVP. Trigeminal neuralgia recurrence: a comparison of microvascular decompression and percutaneous balloon compression: a five years follow-up study. ARQUIVOS DE NEURO-PSIQUIATRIA 2021; 79:51-55. [PMID: 33656112 DOI: 10.1590/0004-282x-anp-2020-0115] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 06/15/2020] [Indexed: 01/03/2023]
Abstract
BACKGROUND About 50% of patients that suffer from trigeminal neuralgia do not experience sustained benefit from the use of oral medication. For their adequate management, a few surgical procedures are available. Of these, percutaneous balloon compression (PBC) and microvascular decompression (MD) are two of the most performed worldwide. In this retrospective study, we present the outcomes of these techniques through estimation of initial pain relief and subsequent recurrence rate. METHODS Thirty-seven patients with medically refractory trigeminal pain surgically treated at Hospital Cajuru, Curitiba, Brazil, with PBC, MD or both between 2013 and 2018 were enrolled into this retrospective study. The post-procedural rate for pain relief and recurrence and associations between patient demographics and outcomes were analyzed. RESULTS MD had an earlier recurrence time than balloon compression. Of the 37 patients, the mean age was 61.6 years, approximately one third were male and most had type I neuralgia. The most affected branch was the maxillary (V2). The time for recurrence after surgery was on average 11.8 months for PBC and 9.0 months for MD. Complications were seen only with microsurgery. CONCLUSIONS MD presented with a more precocious recurrence of pain than PBC in this article. Moreover, it had a higher recurrence rate than described in the literature as well, which is possibly explained by the type of graft (muscle) that was used to separate the neurovascular structures.
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Stringer HK, Borumandi F. Intravenous cannula used for continuous intraoral mandibular nerve block in trigeminal neuralgia. BMJ Case Rep 2021; 14:e240368. [PMID: 33737280 PMCID: PMC7978264 DOI: 10.1136/bcr-2020-240368] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/30/2021] [Indexed: 11/03/2022] Open
Abstract
Trigeminal neuralgia is a chronic pain condition affecting one or more distributions of the trigeminal nerve. Patients with this condition experience short, sharp, shooting pain attacks, which can progress to longer, more frequent durations. The pain is often difficult to control. We report of a man who was admitted with severe neuralgia of the third division of the trigeminal nerve. Talking and any oral intake triggered a severe agonising pain. The latter made the regular oral intake of analgesia challenging. The pain was temporarily controlled with frequent local anaesthesia (LA). Dental core trainees were performing regular inferior alveolar nerve blocks which significantly improved patients' condition allowing him to communicate and have oral intake. Subsequently, a catheter was placed allowing for a continuous anaesthesia. The connecting tube of the cannula was then used by nursing staff to administer LA providing pain relief without the need of repeated intraoral injections.
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Affiliation(s)
- Harriet Katharine Stringer
- Department of Oral and Maxillofacial Surgery, Western Sussex Hospital Foundation Trust, St Richards Hospital and Worthing Hospital, Chichester and Worthing, UK
| | - Farzad Borumandi
- Department of Oral and Maxillofacial Surgery, Western Sussex Hospital Foundation Trust, St Richards Hospital and Worthing Hospital, Chichester and Worthing, UK
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Song D, Li J, Zhai Y, Yang F, Wang M, Zhao C, Wei X. Effects of Preoperative Carbamazepine Treatment on Microvascular Decompression for Classical Trigeminal Neuralgia. World Neurosurg 2021; 149:e63-e70. [PMID: 33647489 DOI: 10.1016/j.wneu.2021.02.090] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 02/18/2021] [Accepted: 02/19/2021] [Indexed: 02/05/2023]
Abstract
BACKGROUND Carbamazepine (CBZ) is the first-line therapy for trigeminal neuralgia (TN), and microvascular decompression (MVD) is considered to be an effective surgical treatment for TN. However, the effect of preoperative CBZ treatment on MVD outcome is not clear. METHODS From 2013 to 2019, 63 patients with classical TN underwent MVD at the First Affiliated Hospital of Zhengzhou University, China. Data were collected through telephone follow-up and electronic medical records in April 2020. Short-term surgical outcome and long-term follow-up data were estimated by univariate and multivariate analysis. RESULTS Multivariate analysis indicated that preoperative CBZ treatment was not a significant predictor for short-term outcomes of MVD (P > 0.05). Multivariate analysis for the long-term outcome of MVD indicated that preoperative CBZ treatment could predict postoperative recurrence of TN (P < 0.05). CONCLUSIONS For patients with classical TN, a longer preoperative medication history of CBZ treatment had no significant effect on short-term outcome of MVD, but CBZ treatment was associated with a poor long-term outcome following MVD.
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Affiliation(s)
- Dixiang Song
- Department of Neurosurgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Jianguo Li
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, China
| | - Yixuan Zhai
- Department of Neurosurgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Fengdong Yang
- Department of Neurosurgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Minkai Wang
- Department of Neurosurgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Chao Zhao
- Department of Neurosurgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Xinting Wei
- Department of Neurosurgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.
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Gambeta E, Chichorro JG, Zamponi GW. Trigeminal neuralgia: An overview from pathophysiology to pharmacological treatments. Mol Pain 2021; 16:1744806920901890. [PMID: 31908187 PMCID: PMC6985973 DOI: 10.1177/1744806920901890] [Citation(s) in RCA: 129] [Impact Index Per Article: 43.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
The trigeminal nerve (V) is the fifth and largest of all cranial nerves, and it is responsible for detecting sensory stimuli that arise from the craniofacial area. The nerve is divided into three branches: ophthalmic (V1), maxillary (V2), and mandibular (V3); their cell bodies are located in the trigeminal ganglia and they make connections with second-order neurons in the trigeminal brainstem sensory nuclear complex. Ascending projections via the trigeminothalamic tract transmit information to the thalamus and other brain regions responsible for interpreting sensory information. One of the most common forms of craniofacial pain is trigeminal neuralgia. Trigeminal neuralgia is characterized by sudden, brief, and excruciating facial pain attacks in one or more of the V branches, leading to a severe reduction in the quality of life of affected patients. Trigeminal neuralgia etiology can be classified into idiopathic, classic, and secondary. Classic trigeminal neuralgia is associated with neurovascular compression in the trigeminal root entry zone, which can lead to demyelination and a dysregulation of voltage-gated sodium channel expression in the membrane. These alterations may be responsible for pain attacks in trigeminal neuralgia patients. The antiepileptic drugs carbamazepine and oxcarbazepine are the first-line pharmacological treatment for trigeminal neuralgia. Their mechanism of action is a modulation of voltage-gated sodium channels, leading to a decrease in neuronal activity. Although carbamazepine and oxcarbazepine are the first-line treatment, other drugs may be useful for pain control in trigeminal neuralgia. Among them, the anticonvulsants gabapentin, pregabalin, lamotrigine and phenytoin, baclofen, and botulinum toxin type A can be coadministered with carbamazepine or oxcarbazepine for a synergistic approach. New pharmacological alternatives are being explored such as the active metabolite of oxcarbazepine, eslicarbazepine, and the new Nav1.7 blocker vixotrigine. The pharmacological profiles of these drugs are addressed in this review.
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Affiliation(s)
- Eder Gambeta
- Department of Physiology and Pharmacology, Alberta Children's Hospital Research Institute and Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Juliana G Chichorro
- Department of Pharmacology, Biological Sciences Sector, Federal University of Parana, Curitiba, Brazil
| | - Gerald W. Zamponi
- Department of Physiology and Pharmacology, Alberta Children's Hospital Research Institute and Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
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Greve T, Tonn JC, Mehrkens JH. Microvascular decompression for trigeminal neuralgia in the elderly: efficacy and safety. J Neurol 2021; 268:532-540. [PMID: 32862244 PMCID: PMC7880960 DOI: 10.1007/s00415-020-10187-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 08/15/2020] [Accepted: 08/24/2020] [Indexed: 11/27/2022]
Abstract
OBJECTIVE The safety and efficacy of surgical microvascular decompression (MVD) in elderly patients with trigeminal neuralgia (TN) is controversially discussed in the literature. A widespread reluctance to expose this cohort to major intracranial surgery persists. Our aim was to compare the efficacy and safety between older and younger patients with TN. METHODS In this cross-sectional study, 139 MVD procedures (103 patients < 70 and 36 patients ≥ 70) were included. Surgical fitness was assessed by the American Society of Anesthesiology (ASA) grade. The pain-free interval was evaluated using Kaplan-Meier analysis only in patients with a recent follow-up visit. Independent risk factors for recurrence in patients with a minimum 12-month follow-up were determined. RESULTS Patients ≥ 70 showed a significantly higher number of comorbidities. Pain intensity, affection of trigeminal branches and symptom duration was similar between groups. No significant difference in treatment associated complications and permanent neurological deficits was shown. There was no treatment-related mortality. A tendency towards a lower recurrence rate in patients < 70 did not reach statistical significance (17.6% vs. 28.6%, P = 0.274). Pain-free interval was not different between both cohorts (78.7 vs. 73.5 months, P = 0.391). CONCLUSION Despite a higher prevalence of comorbidities in elderly patients, complication rates and neurological deficits after MVD were comparable to younger patients. Rates of immediate and long-term pain relief compared favorably to previous studies and were similar between elderly and younger patients. These data endorse MVD as a safe and effective first-line surgical procedure for elderly patients with TN and neurovascular conflict on MRI.
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Affiliation(s)
- Tobias Greve
- Department of Neurosurgery, University Hospital, Ludwig Maximilian University of Munich, Munich, Germany.
| | - Joerg-Christian Tonn
- Department of Neurosurgery, University Hospital, Ludwig Maximilian University of Munich, Munich, Germany
| | - Jan-Hinnerk Mehrkens
- Department of Neurosurgery, University Hospital, Ludwig Maximilian University of Munich, Munich, Germany
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47
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Agarwal A, Rastogi S, Bansal M, Kumar S, Malviya D, Thacker AK. Radiofrequency Treatment of Idiopathic Trigeminal Neuralgia (Conventional vs. Pulsed): A Prospective Randomized Control Study. Anesth Essays Res 2021; 15:14-19. [PMID: 34667342 PMCID: PMC8462427 DOI: 10.4103/aer.aer_56_21] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 06/01/2021] [Accepted: 06/01/2021] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND Idiopathic trigeminal neuralgia (TGN) is a chronic pain disorder causing unilateral, severe brief stabbing recurrent pain in the distribution of one or more branches of the trigeminal nerve. Conventional radiofrequency (CRF) and pulsed radiofrequency (PRF) are two types of minimally invasive treatment. CRF selectively ablates the part of ganglion to provide the relief, but it has been found to be associated with some side effects such as dysesthesia or sensory loss in 6%-28% and loss of corneal reflex in 3%-8% of patients. PRF is a comparatively newer modality which is a nondestructive and neuromodulatory method of delivering radiofrequency energy to the gasserian ganglion to produce a therapeutic effect. AIMS We aimed to compare the efficacy of CRF with long-duration, fixed voltage PRF in the treatment of idiopathic TGN. SETTING This study was conducted in a tertiary care center research institute. STUDY DESIGN This was a prospective randomized trial. MATERIALS AND METHODS Twenty-seven adult patients of TGN were included in the study and randomly allocated into two groups (CRF and PRF). All procedures were performed operation suite with C-arm fluoroscopic guidance. Both, pre- and postprocedure, the patients were assessed for pain on the Visual Analog Scale (VAS) and Barrow Neurological Institute (BNI) Pain Intensity Scale at 1 week and thereafter at 1, 2, 3, and 6 months. Patients with a BNI score ≥4 after 1 month were considered a failure and offered other modes of treatment. A reduction in VAS score ≥50% and a BNI score <4 were considered as effective. STATISTICAL ANALYSIS Discreet variables were recorded as proportions, ordinal variables and continuous variables with non-Gaussian distribution as medians with interquartile range, and continuous variables with Gaussian distribution as mean ± standard deviation. Association between ordinal variables was tested by Fisher's exact test/Chi-square test whenever appropriate. Equality of means/median was tested by using paired/unpaired t-test or nonparametric tests depending upon the distribution of data. P ≤ 0.5 was considered statistically significant. Data analysis was performed using STATA version 13.04 windows. RESULTS Efficacy in terms of decrease in VAS ≥50% at 1 month was 33.33% and 83.33% in the PRF and CRF groups, respectively, which was statistically significant(P = 0.036). Effective reduction in BNI scores at the 7th day, 1 month, and 2 months postprocedure was evaluated and found in 41.67% and 83.33% of patients in the PRF and CRF groups, respectively, which was statistically insignificant (P = 0.089). There was a statistically significant reduction in BNI scores in PRF and CRF group patients at 3 and 6 months (at 3 months, 33.33% and 83.33%, P = 0.036 and at 6 months, 25% and 83.33%, P = 0.012). In the CRF group, mild hypoesthesia was evident in three patients which improved by the end of 1 month while no side effects were seen in the PRF group. CONCLUSION CRF is a more effective procedure to decrease pain in comparison to long-duration, fixed voltage PRF for the treatment of idiopathic TGN. Although the side effects are more with CRF, they are mild and self-limiting.
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Affiliation(s)
- Anurag Agarwal
- Department of Anesthesiology, CCM and Pain Medicine, Dr. RMLIMS, Lucknow, Uttar Pradesh, India
| | - Shivani Rastogi
- Department of Anesthesiology, CCM and Pain Medicine, Dr. RMLIMS, Lucknow, Uttar Pradesh, India
| | - Manjari Bansal
- Department of Anesthesiology, CCM and Pain Medicine, Dr. RMLIMS, Lucknow, Uttar Pradesh, India
| | - Suraj Kumar
- Department of Anesthesiology, CCM and Pain Medicine, Dr. RMLIMS, Lucknow, Uttar Pradesh, India
| | - Deepak Malviya
- Department of Anesthesiology, CCM and Pain Medicine, Dr. RMLIMS, Lucknow, Uttar Pradesh, India
| | - Anup K. Thacker
- Department of Neurology, Dr. RMLIMS, Lucknow, Uttar Pradesh, India
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48
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Boyke AE, Naidu I, Lam S, Alvi MA, Bader ER, Agarwal V. Medical Malpractice and Trigeminal Neuralgia: An Analysis of 49 Cases. J Oral Maxillofac Surg 2020; 79:1026.e1-1026.e8. [PMID: 33515506 DOI: 10.1016/j.joms.2020.12.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 12/23/2020] [Accepted: 12/23/2020] [Indexed: 10/22/2022]
Abstract
PURPOSE Our study fills the vacancy of litigation research related to trigeminal neuralgia management, giving health care providers the information needed to understand the potential litigious outcomes that follow treatment methods. METHODS We queried the Westlaw database to identify litigation cases related to trigeminal neuralgia management. Key variables extracted included medical complaints, trial outcomes, and demographics. Continuous variables were compared between cases in favor of defendant and cases in favor of plaintiff using t-test or Wilcoxon rank sum test. Categorial variables were compared using χ2 or Fisher exact test. RESULTS About 49 cases met the inclusion criteria-for those cases surgical complications (42.9%) were cited as the most common reasons for malpractice claims. Cranial nerve deficits (34.7%) were the most frequent postoperative complaints. Verdicts ruled in favor of the plaintiff in 26.5% of cases with a mean payout of $1,982,428.46. Dentists were included in the most cases, 63.3%, and the average payout was $415,908, whereas neurosurgeons were involved in 20.4% of cases with an average payout of $618,775. Cases with verdicts in favor of the plaintiff were more likely to be older than cases with verdicts in favor of the defendant (P = .03). CONCLUSIONS Over one-half of cases resulted in verdicts in favor of the defendant with surgical complications cited as the most common reason for litigation. Dentistry was the most common individual clinical specialty for defendants, whereas neurosurgery contributed to the largest average payout based on specialty (for n > 1). Cranial nerve deficits were the most common plaintiff postoperative complaints. These analyses may help doctor teams involved in management of trigeminal neuralgia to have a more informed discussion with the patient at every visit so that such litigations may be avoided.
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Affiliation(s)
- Andre E Boyke
- Research Fellow, Montefiore Medical Center - Leo M. Davidoff Department of Neurological Surgery, New York, NY, USA.
| | - Ishan Naidu
- Medical Student Researcher, Montefiore Medical Center - Leo M. Davidoff Department of Neurological Surgery, New York, NY, USA
| | - Sharon Lam
- Medical Student Researcher, Montefiore Medical Center - Leo M. Davidoff Department of Neurological Surgery, New York, NY, USA
| | | | - Edward R Bader
- Research Fellow, Albert Einstein College of Medicine, New York, NY, USA
| | - Vijay Agarwal
- Director, Skull Base Center, Assistant Director, Residency Training Program, Assistant Professor, Leo M. Davidoff Department of Neurological Surgery, Assistant Professor, Department of Otorhinolaryngology-Head & Neck Surgery, Montefiore Medical Center - Leo M. Davidoff Department of Neurological Surgery, New York, NY, USA; Albert Einstein College of Medicine, New York, NY, USA
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49
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Tripathi M, Sadashiva N, Gupta A, Jani P, Pulickal SJ, Deora H, Kaur R, Kaur P, Batish A, Mohindra S, Kumar N. Please spare my teeth! Dental procedures and trigeminal neuralgia. Surg Neurol Int 2020; 11:455. [PMID: 33408940 PMCID: PMC7771490 DOI: 10.25259/sni_729_2020] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 11/17/2020] [Indexed: 02/02/2023] Open
Abstract
Background: The correct diagnosis of trigeminal neuralgia (TN) is still a far cry and the patients suffer from unnecessary dental procedures before getting the definite treatment. In this study, we evaluated, if the patients have undergone dental procedures for their misdiagnosed TN before receiving definite treatment for the same. Methods: A total of 187 patients received GKRS for their TN (excluding secondary TN) in two institutes from 2010 to 2019. We did a retrospective analysis of these patients’ primary complaints on a standard questionnaire. Results: One hundred and seventeen of the 187 patients responded. About 55.5% of patients had a toothache and 65.8% did visit a dentist for the pain. About 41.8% of patients underwent one dental procedure; 18.8% suffered from worsening of the pain while 8.5% received some partial improvement. About 19.6% also underwent root canal treatment while 6.8% had a nerve block. Mean of 1.6 teeth was extracted per person. About 71% of patients were satisfied with their Gamma Knife radiosurgery for TN at a median follow-up of 49 months. Conclusion: There is a need for a better understanding of the disease among the dentists and the patients for the timely and correct treatment, without losing their teeth. The onus lies on neurosurgeons/neurologists disseminate knowledge regarding proper diagnosis and treatment modalities.
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Affiliation(s)
- Manjul Tripathi
- Department of Neurosurgery, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Nishanth Sadashiva
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Anand Gupta
- Department of Dentistry, Government Medical College, Chandigarh, India
| | - Parth Jani
- Department of Neurosurgery, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Sachin Jose Pulickal
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Harsh Deora
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Rupinder Kaur
- Department of Neurosurgery, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Parwinder Kaur
- Department of Neurosurgery, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Aman Batish
- Department of Neurosurgery, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Sandeep Mohindra
- Department of Neurosurgery, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Narendra Kumar
- Department of Radiotherapy, Postgraduate Institute of Medical Education and Reserach, Chandigarh, India
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50
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Smith CA, Paskhover B, Mammis A. Molecular mechanisms of trigeminal neuralgia: A systematic review. Clin Neurol Neurosurg 2020; 200:106397. [PMID: 33338828 DOI: 10.1016/j.clineuro.2020.106397] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 11/26/2020] [Accepted: 11/27/2020] [Indexed: 01/14/2023]
Abstract
OBJECTIVE To conduct a systematic review of the available literature for primary research articles identifying potential gene mutations, polymorphisms and other molecular regulatory mechanisms related to trigeminal neuralgia in order to identify the genetic and molecular models of primary trigeminal neuralgia currently being investigated. METHODS PubMed and Web of Science were systematically searched to identify primary research articles discussing genetic predictors of trigeminal neuralgia and neuropathic pain that were published prior to July 2020. This review was conducted according to PRISMA guidelines. RESULTS Out of the 333 articles originally identified, a total of 14 papers were selected for study inclusion. These articles included 5 human studies, 6 mouse studies and 3 rat studies. Four articles investigated sodium channels, 1 investigated a sodium channel and nerve growth factor receptor, 2 investigated potassium channels, 1 investigated calcium channels, 1 investigated the downstream regulatory element antagonist modulator protein, 1 investigated the dynorphin-kappa opioid receptor system, 1 investigated TRPA1, 1 investigated the Nrg1/ErbB3/ErbB2 signaling complex, 1 investigated a serotonin transporter and 1 investigated potassium channels, sodium channels, calcium channels, chloride channels, TRP channels and gap junctions. CONCLUSION Researchers have identified multiple genetic and molecular targets involved with potential pathophysiologies that have a relationship to the creation of trigeminal neuralgia. At this time, there does not seem to be clear causal frontrunner, demonstrating the possibility that genetic predisposition to trigeminal neuralgia may involve multiple genes and/or downstream products, such as ion channels.
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Affiliation(s)
- Cynthia A Smith
- Rutgers New Jersey Medical School, Department of Neurological Surgery, Newark, NJ, USA.
| | - Boris Paskhover
- Rutgers New Jersey Medical School, Department of Otolaryngology - Head & Neck Surgery, Newark, NJ, USA.
| | - Antonios Mammis
- NYU Grossman School of Medicine, Department of Neurosurgery, New York, NY, USA.
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