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Singh R. Study of Topography of Stylomastoid Foramen With Respect to Nearby Landmarks to Carry Out Facial Nerve Block With Minimum Complications. J Craniofac Surg 2024; 35:1568-1571. [PMID: 38408324 DOI: 10.1097/scs.0000000000010066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2023] [Accepted: 01/22/2024] [Indexed: 02/28/2024] Open
Abstract
Nadbath facial nerve block is the most common procedure to anesthetize the facial nerve at stylomastoid foramen in intraocular surgeries, but it is associated with complications. Also, this foramen exhibits ethnic and racial variations with regard to its location. There is scanty literature describing the topographical location of this foramen. So, the study is carried out. The purpose of the study is to describe the topography of stylomastoid foramen from the surrounding landmarks so that Nadbath facial nerve block can be performed with minimum complications. The study was conducted using 80 adult dry skulls of unknown age and sex, and the distance of this foramen was measured from the tip, upper end, and lower end of the anterior border of the mastoid process and jugular foramen. The statistical analysis consisting of mean, SD, median, range mode, and t test was calculated. Mean distances of stylomastoid foramen from the upper end, the lower end of anterior border and tip of mastoid process and jugular foramen on right side were 1.5±0.16, 1.02±0.09, 0.84±0.09, and 0.49±0.06 cm and those on left side were 1.5±0.16, 1.02±0.09, 0.84±0.09, and 0.5±0.06 cm, respectively. The mode of these distances was 1.5, 1, 0.8, and 0.5, both on the right and left sides. The topographic information about stylomastoid foramen given in this study is useful to anesthetists to carry out Nadbath facial nerve block successfully with minimum complications.
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Affiliation(s)
- Rajani Singh
- Department of Anatomy, Uttar Pradesh University of Medical Sciences Saifai Etawah, Uttar Pradesh, India
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2
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Yurdabakan ZZ, Okumuş Ö, Orhan K. Evaluation of the Morphometry of the Stylomastoid Foramen in the Turkish Population: A Retrospective Study Using Cone-Beam Computed Tomography (CBCT). J Neurol Surg B Skull Base 2023; 84:521-529. [PMID: 37671299 PMCID: PMC10477010 DOI: 10.1055/a-1993-7468] [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: 09/20/2022] [Accepted: 12/01/2022] [Indexed: 12/12/2022] Open
Abstract
Objectives This study aimed to investigate the morphometric features of the stylomastoid foramen (SMF) and the facial canal in the Turkish population using cone-beam computed tomography (CBCT) retrospectively. Methods The randomly selected 479 patients aged from 8 to 87 years were examined, and a total of 958 CBCT images of the SMF and facial canal (FC) were analyzed. The diameter of the SMF and FC at the mastoid segment and their relation to age, gender, and side were evaluated. Statistical analyses were performed using Kolmogorov-Smirnov, one-way analysis of variance, Student's t -test, chi-squared test, Tukey's honestly significant difference, and Fisher-Freeman-Halton exact test. p -Values < 0.05 were accepted as statistically significant at the 95% confidence interval. Results The mean age of the patients was 40.49 ± 19.73 years. The mean diameter of the right SMF was 2.24 ± 0.58 and 2.50 ± 0.63 mm in females and males. The mean diameter of the left SMF was 2.25 ± 0.56 and 2.44 ± 0.62 mm in females and males. The mean diameter of the right FC was 1.60 ± 0.35 and 1.70 ± 0.34 mm in females and males. The mean diameter of left FC was 1.55 ± 0.35 and 1.66 ± 0.33 mm in females and males. A statistically significant difference was found between the age groups in terms of the mean SMF and FC diameter on both sides ( p < 0.05). Conclusion Information obtained from this study regarding the morphometric features of the SMF and thereby FC may assist surgeons in treatment plans and reduce the risk of neurosurgical complications.
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Affiliation(s)
- Zeliha Zuhal Yurdabakan
- Department of Oral and Dentomaxillofacial Radiology, Faculty of Dentistry, Altinbas University, Istanbul, Turkey
| | - Özlem Okumuş
- Department of Oral and Dentomaxillofacial Radiology, Faculty of Dentistry, Altinbas University, Istanbul, Turkey
| | - Kaan Orhan
- Department of Oral and Dentomaxillofacial Radiology, Faculty of Dentistry, Ankara University, Ankara, Turkey
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3
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Truong M, Maclaurin W, Tan H, Hill F, Dixon A. A rare finding of bilateral facial canal meningoceles involving the tympanic segment in suspected idiopathic intracranial hypertension. Radiol Case Rep 2023; 18:3184-3187. [PMID: 37434617 PMCID: PMC10331308 DOI: 10.1016/j.radcr.2023.06.036] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Accepted: 06/17/2023] [Indexed: 07/13/2023] Open
Abstract
Meningoceles are a common radiological feature found in cases of idiopathic intracranial hypertension (IIH). Rarely, they can affect the facial canal within the petrous temporal bone, leading to symptoms such as facial nerve palsy, hearing loss or meningitis. This is the first case report that describes bilateral facial canal meningoceles involving the tympanic segment of the canal. Prominent Meckel's caves were also seen on MRI, a feature commonly associated with IIH.
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Affiliation(s)
- Michelle Truong
- Department of Otolaryngology, The Alfred Hospital, 55 Commercial Rd, Melbourne VIC 3004, Australia
| | - William Maclaurin
- Department of Radiology, The Alfred Hospital, 55 Commercial Rd, Melbourne VIC 3004, Australia
| | - Hannah Tan
- Department of Otolaryngology, The Alfred Hospital, 55 Commercial Rd, Melbourne VIC 3004, Australia
| | - Fiona Hill
- Department of Otolaryngology, The Alfred Hospital, 55 Commercial Rd, Melbourne VIC 3004, Australia
| | - Andrew Dixon
- Department of Radiology, The Alfred Hospital, 55 Commercial Rd, Melbourne VIC 3004, Australia
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4
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Yeh P, Wu PH, Cheng PW. Nontuberculous mycobacteria otomastoiditis with facial palsy. Pediatr Neonatol 2023; 64:353-354. [PMID: 36740562 DOI: 10.1016/j.pedneo.2022.05.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Revised: 04/22/2022] [Accepted: 05/10/2022] [Indexed: 02/05/2023] Open
Affiliation(s)
- Peng Yeh
- Department of Otolaryngology, Far Eastern Memorial Hospital, New Taipei City, Taiwan
| | - Po-Hsuan Wu
- Department of Otolaryngology, Far Eastern Memorial Hospital, New Taipei City, Taiwan
| | - Po-Wen Cheng
- Department of Otolaryngology, Far Eastern Memorial Hospital, New Taipei City, Taiwan.
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5
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Rath TJ, Policeni B, Juliano AF, Agarwal M, Block AM, Burns J, Conley DB, Crowley RW, Dubey P, Friedman ER, Gule-Monroe MK, Hagiwara M, Hunt CH, Jain V, Powers WJ, Rosenow JM, Taheri MR, DuChene Thoma K, Zander D, Corey AS. ACR Appropriateness Criteria® Cranial Neuropathy: 2022 Update. J Am Coll Radiol 2022; 19:S266-S303. [PMID: 36436957 DOI: 10.1016/j.jacr.2022.09.021] [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: 08/29/2022] [Accepted: 09/07/2022] [Indexed: 11/27/2022]
Abstract
Cranial neuropathy can result from pathology affecting the nerve fibers at any point and requires imaging of the entire course of the nerve from its nucleus to the end organ in order to identify a cause. MRI with and without intravenous contrast is often the modality of choice with CT playing a complementary role. The ACR Appropriateness Criteria are evidence-based guidelines for specific clinical conditions that are reviewed annually by a multidisciplinary expert panel. The guideline development and revision process support the systematic analysis of the medical literature from peer-reviewed journals. Established methodology principles such as Grading of Recommendations Assessment, Development, and Evaluation or GRADE are adapted to evaluate the evidence. The RAND/UCLA Appropriateness Method User Manual provides the methodology to determine the appropriateness of imaging and treatment procedures for specific clinical scenarios. In those instances in which peer-reviewed literature is lacking or equivocal, experts may be the primary evidentiary source available to formulate a recommendation.
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Affiliation(s)
- Tanya J Rath
- Division Chair of Neuroradiology, Mayo Clinic Arizona, Phoenix, Arizona.
| | - Bruno Policeni
- Panel Chair; Department of Radiology Vice-Chair, University of Iowa Hospitals and Clinics, Iowa City, Iowa; President Iowa Radiological Society and ACR Councilor
| | - Amy F Juliano
- Panel Vice-Chair, Massachusetts Eye and Ear, Harvard Medical School, Boston, Massachusetts; NI-RADS committee chair
| | - Mohit Agarwal
- Froedtert Memorial Lutheran Hospital Medical College of Wisconsin, Milwaukee, Wisconsin; Fellowship Program Director
| | - Alec M Block
- Stritch School of Medicine Loyola University Chicago, Maywood, Illinois
| | - Judah Burns
- Montefiore Medical Center, Bronx, New York; Vice-Chair for Education & Residency Program Director, Montefiore Medical Center; Vice-Chair, Subcommittee on Methodology
| | - David B Conley
- Practice Director, Northwestern ENT and Rhinology Fellowship Director, Northwestern University Feinberg School of Medicine, Chicago, Illinois; and Member, American Academy of Otolaryngology-Head and Neck Surgery
| | - R Webster Crowley
- Rush University Medical Center, Chicago, Illinois; Neurosurgery expert; Chief, Cerebrovascular and Endovascular Neurosurgery; Medical Director, Department of Neurosurgery; Surgical Director, Rush Comprehensive Stroke Center; Program Director, Endovascular Neurosurgery
| | | | - Elliott R Friedman
- University of Texas Health Science Center, Houston, Texas; Diagnostic Radiology Residency Program Director
| | - Maria K Gule-Monroe
- The University of Texas MD Anderson Cancer Center, Houston, Texas; Medical Director of Diagnostic Imaging at Houston Area Location Woodlands
| | - Mari Hagiwara
- Neuroradiology Fellowship Program Director and Head and Neck Imaging Director, New York University Langone Medical Center, New York, New York
| | | | - Vikas Jain
- MetroHealth Medical Center, Cleveland, Ohio; Medical Director, Lumina Imaging
| | - William J Powers
- University of North Carolina School of Medicine, Chapel Hill, North Carolina; American Academy of Neurology
| | - Joshua M Rosenow
- Neuroradiology Fellowship Program Director and Head and Neck Imaging Director, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - M Reza Taheri
- George Washington University Hospital, Washington, District of Columbia; Director of Neuroradiology
| | - Kate DuChene Thoma
- Director of Faculty Development Fellowship, University of Iowa Hospital, Iowa City, Iowa; Primary care physician
| | - David Zander
- Chief of Head and Neck Radiology, University of Colorado Denver, Denver, Colorado
| | - Amanda S Corey
- Specialty Chair, Atlanta VA Health Care System and Emory University, Atlanta, Georgia
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Ottaiano AC, Gomez GD, Freddi TDAL. The Facial Nerve: Anatomy and Pathology. Semin Ultrasound CT MR 2022; 44:71-80. [PMID: 37055142 DOI: 10.1053/j.sult.2022.11.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The facial nerve is the seventh cranial nerve and consists of motor, parasympathetic and sensory branches, which arise from the brainstem through 3 different nuclei (1). After leaving the brainstem, the facial nerve divides into 5 intracranial segments (cisternal, canalicular, labyrinthine, tympanic, and mastoid) and continues as the intraparotid extracranial segment (2). A wide variety of pathologies, including congenital abnormalities, traumatic disorders, infectious and inflammatory disease, and neoplastic conditions, can affect the facial nerve along its pathway and lead to weakness or paralysis of the facial musculature (1,2). The knowledge of its complex anatomical pathway is essential to clinical and imaging evaluation to establish if the cause of the facial dysfunction is a central nervous system process or a peripheral disease. Both computed tomography (CT) and magnetic resonance imaging (MRI) are the modalities of choice for facial nerve assessment, each of them providing complementary information in this evaluation (1).
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Li J, Yao Y, Wang Y, Xu J, Zhao D, Liu M, Shi S, Lin Y. Modulation of the Crosstalk between Schwann Cells and Macrophages for Nerve Regeneration: A Therapeutic Strategy Based on a Multifunctional Tetrahedral Framework Nucleic Acids System. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2202513. [PMID: 35483031 DOI: 10.1002/adma.202202513] [Citation(s) in RCA: 64] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 04/17/2022] [Indexed: 02/05/2023]
Abstract
Peripheral nerve injury (PNI) is currently recognized as one of the most significant public health issues and affects the general well-being of millions of individuals worldwide. Despite advances in nerve tissue engineering, nerve repair still cannot guarantee complete functional recovery. In the present study, an innovative approach is adopted to establish a multifunctional tetrahedral framework nucleic acids (tFNAs) system, denoted as MiDs, which can integrate the powerful programmability, permeability, and structural stability of tFNAs, with the nerve regeneration potential of microRNA-22 to enhance the communication between Schwann cells (SCs) and macrophages for more effective functional rehabilitation of peripheral nerves. Relevant results demonstrate that MiDs can amplify the ability of SCs to recruit macrophages and facilitate their polarization into the pro-healing M2 phenotype to reconstruct the post-injury microenvironment. Furthermore, MiDs can initiate the adaptive intracellular reprogramming of SCs within a short period to further promote axon regeneration and remyelination. MiDs represent a new possibility for enhancing nerve repair and may have critical clinical applications in the future.
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Affiliation(s)
- Jiajie Li
- State Key Laboratory of Oral Diseases National Clinical Research Center for Oral Diseases West China Hospital of Stomatology Sichuan University Chengdu 610041 P. R. China
| | - Yangxue Yao
- State Key Laboratory of Oral Diseases National Clinical Research Center for Oral Diseases West China Hospital of Stomatology Sichuan University Chengdu 610041 P. R. China
| | - Yun Wang
- State Key Laboratory of Oral Diseases National Clinical Research Center for Oral Diseases West China Hospital of Stomatology Sichuan University Chengdu 610041 P. R. China
| | - Jiangshan Xu
- College of Biomedical Engineering Sichuan University Chengdu 610041 P. R. China
| | - Dan Zhao
- State Key Laboratory of Oral Diseases National Clinical Research Center for Oral Diseases West China Hospital of Stomatology Sichuan University Chengdu 610041 P. R. China
| | - Mengting Liu
- State Key Laboratory of Oral Diseases National Clinical Research Center for Oral Diseases West China Hospital of Stomatology Sichuan University Chengdu 610041 P. R. China
| | - Sirong Shi
- State Key Laboratory of Oral Diseases National Clinical Research Center for Oral Diseases West China Hospital of Stomatology Sichuan University Chengdu 610041 P. R. China
| | - Yunfeng Lin
- State Key Laboratory of Oral Diseases National Clinical Research Center for Oral Diseases West China Hospital of Stomatology Sichuan University Chengdu 610041 P. R. China
- College of Biomedical Engineering Sichuan University Chengdu 610041 P. R. China
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8
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Oral motor dysfunction after carotid endarterectomy: Challenges in diagnosing marginal mandibular nerve injury and effectiveness of rehabilitation. Turk J Phys Med Rehabil 2021; 67:107-110. [PMID: 33948551 PMCID: PMC8088796 DOI: 10.5606/tftrd.2021.6596] [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: 05/13/2020] [Accepted: 07/23/2020] [Indexed: 11/21/2022] Open
Abstract
Carotid endarterectomy (CEA) is a frequently used surgical treatment for carotid artery stenosis. Cranial and peripheral nerve injuries are among the intraoperative complications. Diagnosing isolated injuries of the marginal mandibular branch of the facial nerve after CEA is challenging and leads to oral motor dysfunction that affects the patient's quality of life. Early diagnosis and treatment are valuable, since delayed diagnosis requires a surgical restoration of the affected nerve or muscle. In this article, we present a case of marginal mandibular nerve injury after CEA to increase the awareness on this complication and highlight the importance of rehabilitation for these cases, even in the chronic phase.
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9
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Cakmak V, Cakmak P. Does otosclerosis affect the dimensions of the facial canal and cochlear aquaduct? Eur Arch Otorhinolaryngol 2021; 278:1845-1852. [PMID: 33550475 DOI: 10.1007/s00405-021-06655-2] [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] [Received: 12/14/2020] [Accepted: 01/27/2021] [Indexed: 12/18/2022]
Abstract
PURPOSE Our aim was to evaluate the relationship of the dimensions of the facial canal (FC) and cochlear aqueduct (CA) in otosclerosis (OS) with the type and severity of OS. METHODS Two radiologists retrospectively evaluated temporal bone high-resolution computed tomography (HRCT) images obtained from 48 healthy individuals and 94 OS patients between January 2015 and July 2020. In the study group, the CA width, funnel base width, and funnel length, in addition to the FC transverse length, were measured in the axial plane. The CA length was measured in the coronal plane on HRCT images. The FC craniocaudal length was measured in the same plane as the fissula ante fenestram (FAF) in coronal reformatted HRCT images. Grading of OS was based on otosclerotic plaque density and new bone formation extending toward the tympanic cavity at the FAF level. RESULTS In the OS patients, the CA width and FC craniocaudal and FC transverse diameters were significantly decreased on both sides compared to those in the control group (p < 0.001). In fenestral OS, the FC craniocaudal and transverse widths on both sides were statistically significantly lower than the FC widths in the control group (p < 0.0001). A statistically negative correlation was found in the FC craniocaudal (r = - 0.831/- 0.818) and transverse (r = - 0.742/- 0.750) measurements on both sides in accordance with an increase in the otosclerotic plaque density (p < 0.0001). CONCLUSION The presence of narrowing in the FC and CA adjacent to the FAF supports the role of autoimmunity theory in the etiology of OS.
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Affiliation(s)
- Vefa Cakmak
- Department of Radiology, Faculty of Medicine, Pamukkale University, Denizli, Turkey.
| | - Pinar Cakmak
- Department of Radiology, Faculty of Medicine, Pamukkale University, Denizli, Turkey
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Geethapriya S, Govindaraj J, Raghavan B, Ramakrishnan B, Arafath R, Vishwanathan S, Krishna M. Cranial nerve schwannoma - A pictorial essay. Indian J Radiol Imaging 2020; 30:116-125. [PMID: 33100678 PMCID: PMC7546302 DOI: 10.4103/ijri.ijri_17_20] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 03/13/2020] [Accepted: 04/09/2020] [Indexed: 01/25/2023] Open
Abstract
Schwannomas are peripheral nerve sheath tumours arising from cranial, spinal or peripheral nerves. Most of the schwannomas are benign with the rare possibility of malignant transformation. Cranial nerve schwannomas can be seen along the course of any cranial nerve in the intracranial region or head and neck location. Although a majority are solitary sporadic lesions, multiple schwannomas can be seen in syndromes like neurofibromatosis type 2 and rarely in type 1. Since intracranial schwannomas are slow-growing, clinical presentation varies between no symptoms to cranial nerve palsy. Most of the times, the symptoms are due to mass effect over the adjacent structures, foraminal widening, compression of other cranial nerves, denervation injury or hydrocephalus. Familiarity with the course of the cranial nerves, imaging appearances and clinical presentation of schwannomas helps in accurate diagnosis and possible differential diagnosis, especially in uncommon clinical and radiological appearances. In this pictorial review, we illustrate relevant anatomy of cranial nerves, imaging features of schwannomas of most of the cranial nerves, clinical presentation and differential diagnosis.
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Affiliation(s)
- Sivaramalingam Geethapriya
- Department of Radiology, Apollo Cancer Institutes, Padma Complex, Anna Salai, Chennai, Tamil Nadu, India
| | - Jayaraj Govindaraj
- Department of Radiology, Apollo Cancer Institutes, Padma Complex, Anna Salai, Chennai, Tamil Nadu, India
| | - Bagyam Raghavan
- Department of Radiology, Apollo Cancer Institutes, Padma Complex, Anna Salai, Chennai, Tamil Nadu, India
| | - Banupriya Ramakrishnan
- Department of Radiology, Apollo Cancer Institutes, Padma Complex, Anna Salai, Chennai, Tamil Nadu, India
| | - Rasheed Arafath
- Department of Radiology, Apollo Cancer Institutes, Padma Complex, Anna Salai, Chennai, Tamil Nadu, India
| | - Sathyashree Vishwanathan
- Department of Radiology, Apollo Cancer Institutes, Padma Complex, Anna Salai, Chennai, Tamil Nadu, India
| | - Murali Krishna
- Department of Radiology, Apollo Cancer Institutes, Padma Complex, Anna Salai, Chennai, Tamil Nadu, India
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Usefulness of electrophysiology in the prediction of outcome of Bell’s palsy patients. EGYPTIAN RHEUMATOLOGY AND REHABILITATION 2020. [DOI: 10.1186/s43166-020-00022-5] [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
Bell’s palsy (BP) is a common idiopathic cranial mononeuropathy. The electrophysiological tests are one of supportive tools for localizing the site of facial nerve lesion, and to determine the severity and prognosis of the injury. The aim of this study was to evaluate the role of electrophysiology in the prediction of outcome of patients with Bell’s palsy. This study was carried out on 30 adult patients with Bell’s palsy. All study subjects were assessed clinically by Sunnybrook facial nerve grading score (SBS) and electrophysiologically by electroneurography (ENoG), blink reflex (BR), and electromyography (EMG); first evaluation was within 7th to10th day from onset, the second evaluation was done at 20th day, and the follow-up visit was after 1 month to assess the clinical grading system (SBS).
Results
At 1 month, 20 patients (66.7%) had good recovery, while 10 patients (33.3%) had poor recovery according to the Sunnybrook scale. Multiple logistic regression analysis showed that the most significant predictive indicator of BP recovery was ENoG value and R1 latency of BR test. The receiver operating characteristic (ROC) curves showed ENoG degeneration index of 74.6%, considered as a critical cutoff value of non-recovery, with the sensitivity 95% and specificity 90%, and the highest specificity was with blink reflex parameters (R1, R2 latency) 100%.
Conclusion
BR and ENoG were the best predictors of non-recovery of facial function, while EMG findings did not add any prognostic significance. The combination of both tests BR and ENoG, along with clinical findings can be considered a good indication in the acute phase of BP for the possibility to develop palsy residua.
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Does Mastoid Pneumatization Affect Facial Canal Dimensions and Distances of Facial Tympanic Segment-Scutum and Lateral Semicircular Canal-Scutum? J Comput Assist Tomogr 2020; 44:380-385. [PMID: 32168084 DOI: 10.1097/rct.0000000000000992] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
OBJECTIVES In the present study, we investigated whether mastoid pneumatization affects facial canal dimensions and distances of facial tympanic segment and scutum, and lateral semicircular (LSS) canal and scutum. METHODS One hundred sixty-one temporal multidetector computed tomography scans were reviewed. Patients with unilateral sclerotic mastoid pneumatization (no aeration) (group 1, n = 81) and unilateral total mastoid pneumatization (100.0% aeration) (group 2, n = 80) were included. Facial canal dimensions at the labrythine, tympanic, and mastoid segments; facial canal dehiscence and length; and facial tympanic segment-scutum and LSS canal-scutum distances were evaluated. RESULTS In the present study, facial canal dimensions of labyrinthine, tympanic, and mastoid segments in total pneumatized mastoid group were significantly lower than sclerotic mastoids on axial and coronal images (P < 0.05). Facial tympanic segment and scutum distance of the sclerotic mastoid group was significantly lower than those of the total pneumatized mastoid group (P < 0.05). However, LSS canal-scutum distance was not different between both groups (P > 0.05). The LSS canal-scutum distance of the females was lower than those of the males (P < 0.05). Facial canal dehiscence ratio was 11.3% and 11.1% in sclerotic and total pneumatized mastoids, respectively. The mean ± SD length of the dehiscence was 2.46 ± 1.29 mm in pneumatized mastoids and 1.92 ± 0.68 mm in sclerotic mastoids. CONCLUSIONS In cholesteatoma cases, scutum erosion may occur. Because facial tympanic segment and scutum distance decreased in sclerotic mastoids compared with completely pneumatized ones, maximum care must be taken in the operations for avoiding to damage facial canal and nerve. Revision cases may be more difficult because of distorted anatomy. However, in pneumatized mastoids, the mean length of the facial canal was more than 2 mm, which must be kept in mind during operations.
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13
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Benson JC, Eckel L, Guerin J, Silvera VM, Diehn F, Passe T, Carlson ML, Lane JI. Review of Temporal Bone Microanatomy. Clin Neuroradiol 2019; 30:209-219. [DOI: 10.1007/s00062-019-00864-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Accepted: 11/19/2019] [Indexed: 10/25/2022]
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Induruwa I, Holland N, Gregory R, Khadjooi K. The impact of misdiagnosing Bell's palsy as acute stroke. Clin Med (Lond) 2019; 19:494-498. [PMID: 31732591 DOI: 10.7861/clinmed.2019-0123] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Idiopathic Bell's palsy can lead to a serious and, sometimes permanently, disfiguring and emotionally challenging facial palsy. Early diagnosis and treatment with corticosteroids are important, as they significantly improve recovery rates. Bell's palsy is a benign condition that should be diagnosed and managed in primary care. Patients who self-present to the emergency department should be managed and discharged without needing admission. We reviewed all patients referred urgently to our hospital with facial weakness and discharged with a diagnosis of Bell's palsy, to explore whether clinicians were confident in making this diagnosis at initial assessment and, if not, how often they sought a specialist opinion. Furthermore, we assessed the impact of its over-investigation and mistreatment on healthcare resources and the patients.
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Affiliation(s)
- Isuru Induruwa
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - Negin Holland
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK and Association of British Neurologists, London, UK
| | - Rosalind Gregory
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - Kayvan Khadjooi
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
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Significance of the Marginal Mandibular Branch in Relation to Facial Palsy Reconstruction: Assessment of Microanatomy and Macroanatomy Including Axonal Load in 96 Facial Halves. Ann Plast Surg 2019; 83:e43-e49. [PMID: 31567417 DOI: 10.1097/sap.0000000000002038] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND The marginal mandibular branch (MMB) of the facial nerve provides lower lip symmetry apparent during human smile or crying and is mandatory for vocal phonation. In treating facial palsy patients, so far, little attention is directed at the MMB in facial reanimation surgery. However, isolated paralysis may occur congenital, in Bell's palsy or iatrogenic during surgery, prone to its anatomical course. A variety of therapies address symmetry with either weakening of the functional side or reconstruction of the paralyzed side. To further clarify the histoanatomic basis of facial reanimation procedures using nerve transfers, we conducted a human cadaver study examining macroanatomical and microanatomical features of the MMB including its axonal capacity. METHODS Nerve biopsies of the MMB were available from 96 facial halves. Histological processing, digitalization, nerve morphometry investigation, and semiautomated axonal quantification were performed. Statistical analysis was conducted with P < 0.05 as level of significance. RESULTS The main branch of 96 specimens contained an average of 3.72 fascicles 1 to 12, and the axonal capacity was 1603 ± 849 (398-5110, n = 85). Differences were found for sex (P = 0.018), not for facial sides (P = 0.687). Diameters were measured with 1130 ± 327 μm (643-2139, n = 79). A significant difference was noted between sexes (P = 0.029), not for facial sides (P = 0.512.) One millimeter in diameter corresponded to 1480 ± 630 axons (n = 71). A number of 900 axons was correlated with 0.97 mm (specificity, 90%; sensitivity, 72%). CONCLUSIONS Our morphometric results for the MMB provide basic information for further investigations, among dealing with functional reconstructive procedures such as nerve transfers, nerve grafting for direct neurotization or babysitter procedures, and neurectomies to provide ideal power and authenticity.
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Is there a relationship between mastoid pneumatisation and facial canal dimensions? The Journal of Laryngology & Otology 2019; 133:546-553. [PMID: 31120011 DOI: 10.1017/s0022215119001038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE To evaluate mastoid pneumatisation and facial canal dimensions. METHOD In this retrospective study, 169 multidetector computed tomography scans of temporal bone were reviewed. Facial canal dimensions were evaluated at the labyrinthine, tympanic and mastoid segments using axial and coronal multidetector computed tomography scans of temporal bone. Mastoid pneumatisation and facial canal dehiscence were evaluated. Facial canal dehiscence was measured if it was found to be present. RESULTS This study showed that facial canal dimensions decreased in pneumatised mastoids. Facial canal dimensions in females were smaller than in males. Facial canal dehiscence was detected in 5.9 per cent and 6.5 per cent of the patients on the right and left sides, respectively. No correlations were found between facial canal dehiscence and mastoid pneumatisation. The length of dehiscence was 1.92 ± 0.44 mm (range, 0.86-2.51 mm) on the left side. In older subjects, left facial canal dehiscence was detected more, and the length of the dehiscence increased. CONCLUSION This study concluded that during surgery, facial canal dehiscence should be kept in mind in order to avoid complications.
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Zhang Z, Yin H, Wang Z, Li J, Lv H, Zhao P, Yang Z, Wang Z. Imaging re-evaluation of the tympanic segment of the facial nerve canal using cone-beam computed tomography compared with multi-slice computed tomography. Eur Arch Otorhinolaryngol 2019; 276:1933-1941. [DOI: 10.1007/s00405-019-05419-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Accepted: 04/07/2019] [Indexed: 01/17/2023]
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Abstract
Bell’s palsy is the most common condition involving a rapid and unilateral onset of peripheral paresis/paralysis of the seventh cranial nerve. It affects 11.5–53.3 per 100,000 individuals a year across different populations. Bell’s palsy is a health issue causing concern and has an extremely negative effect on both patients and their families. Therefore, diagnosis and prompt cause determination are key for early treatment. However, the etiology of Bell’s palsy is unclear, and this affects its treatment. Thus, it is critical to determine the causes of Bell’s palsy so that targeted treatment approaches can be developed and employed. This article reviews the literature on the diagnosis of Bell’s palsy and examines possible etiologies of the disorder. It also suggests that the diagnosis of idiopathic facial palsy is based on exclusion and is most often made based on five factors including anatomical structure, viral infection, ischemia, inflammation, and cold stimulation responsivity.
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Hiyama T, Sekiya K, Kuno H, Oda S, Kusumoto M, Minami M, Kobayashi T. Imaging of extracranial head and neck lesions in cancer patients: a symptom-based approach. Jpn J Radiol 2019; 37:354-370. [PMID: 30911985 DOI: 10.1007/s11604-019-00832-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 03/17/2019] [Indexed: 02/06/2023]
Abstract
Besides intracranial lesions, neurological symptoms are also caused in cancer patients by extracranial lesions in the head and neck. Common symptoms caused by such lesions include visual loss, visual field defect, diplopia, ptosis, sensory abnormalities of the head and neck region, facial nerve palsy, dysphagia, dysarthria, hoarseness, and syncope. Some cancer patients often have multiple cranial nerve involvement, which is associated with several syndromes such as jugular foramen syndrome. The main causes of cranial nerve dysfunction due to extracranial lesions include bone and nodal metastasis, perineural tumor spread, inflammation, and radiation injury. The location of the lesions causing the neurological symptom may be estimated by the symptoms and physical examination. However, CT/MRI is critical for reaching the final diagnosis and for treatment planning and management of the cancer patients. Moreover, early identification of the extracranial lesions may significantly affect patient care and alter outcomes. Thus, radiologists should be familiar with imaging findings of the common neurological disorders and the complex anatomy of the head and neck region, which should be checked in cancer patients with neurological symptoms.
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Affiliation(s)
- Takashi Hiyama
- Department of Diagnostic Radiology, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan.
| | - Kotaro Sekiya
- Department of Diagnostic Radiology, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan
| | - Hirofumi Kuno
- Department of Diagnostic Radiology, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan
| | - Shioto Oda
- Department of Diagnostic Radiology, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan
| | - Masahiko Kusumoto
- Department of Diagnostic Radiology, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan.,Department of Diagnostic Radiology, National Cancer Center Hospital, 5-1-1, Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan
| | - Manabu Minami
- Department of Diagnostic and Interventional Radiology, Faculty of Medicine, University of Tsukuba, 2-1-1 Amakubo, Tsukuba, Ibaraki, 305-8576, Japan
| | - Tatsushi Kobayashi
- Department of Diagnostic Radiology, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan
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Atkinson C, Fuller J, Huang B. Cross-Sectional Imaging Techniques and Normal Anatomy of the Salivary Glands. Neuroimaging Clin N Am 2018; 28:137-158. [DOI: 10.1016/j.nic.2018.01.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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CT and MR Imaging of the Pediatric Temporal Bone: Normal Variants and Pitfalls. CURRENT RADIOLOGY REPORTS 2017. [DOI: 10.1007/s40134-017-0225-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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da Franca Pereira MA, Bittencourt AG, de Andrade EM, Bento RF, de Brito R. Decompression of the tympanic and labyrinthine segments of the facial nerve by middle cranial fossa approach: an anatomic study. Acta Neurochir (Wien) 2016; 158:1205-11. [PMID: 27068046 DOI: 10.1007/s00701-016-2796-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Accepted: 03/27/2016] [Indexed: 11/30/2022]
Abstract
BACKGROUND Peripheral facial palsy is characterized by the permanent or temporary interruption of facial muscle function. The middle cranial fossa (MCF) approach has been used to decompress the facial nerve (FN) when hearing needs to be preserved. In this work, we describe a technique for decompressing the FN through the MCF approach, which allows the direct exposure of the labyrinthine and entire tympanic segment of the FN, with preservation of inner ear function. METHODS Twenty cadavers heads were used in this study. The reference landmarks used were the middle meningeal artery, greater superficial petrosal nerve, arcuate eminence, inferior petrosal sinus and meatal plane following the petrous apex from its most anterior and medial portion. RESULTS The tympanic segment of the FN presented, on average, a total length of 11 ± 0.67 mm to the right and 11.5 ± 0.60 mm to the left. The longitudinal lengths of the bone window in the tegmen tympani were 16.8 ± 1.67 mm to the right and 16.8 ± 1.20 mm to the left. The cross-sectional lengths of the bone window in the tegmen tympani were 5.5 ± 1.20 mm and 5.0 ± 1.75 mm to the right and left sides, respectively. The average value of the elliptical area formed by the longitudinal and transversal lengths of the bone window made in the tegmen tympani was 72.5 ± 22.5 mm(2) to the right and 65.9 ± 30.3 mm(2) to the left. CONCLUSION The proposed technique can be used for the surgical decompression of the tympanic, labyrinthine and meatal segments of the FN through the MCF in addition to reducing the surgical time and the risk to patients.
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Affiliation(s)
- Marcos Alexandre da Franca Pereira
- Department of Otolaryngology, Nova Esperança Medical School (FAMENE), Rua Gov. Antonio da Silva Mariz, 600\198, João Pessoa, Brazil, CEP 58046-518.
- Department of Otolaryngology, University of São Paulo School of Medicine, São Paulo, Brazil.
| | | | - Emerson Magno de Andrade
- Division of Functional Neurosurgery, Department of Neurology, University of São Paulo School of Medicine, São Paulo, Brazil
| | - Ricardo Ferreira Bento
- Department of Otolaryngology, University of São Paulo School of Medicine, São Paulo, Brazil
| | - Rubens de Brito
- Department of Otolaryngology, University of São Paulo School of Medicine, São Paulo, Brazil
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