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Sulli D, Shankar C, Raikar SG. Peripheral Nerve Sheath Tumor: A Diagnostic and Therapeutic Challenge. Cureus 2024; 16:e56601. [PMID: 38646284 PMCID: PMC11031624 DOI: 10.7759/cureus.56601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/11/2024] [Indexed: 04/23/2024] Open
Abstract
INTRODUCTION Peripheral nerve tumors are a group of rare soft tissue tumors of neuro-ectodermal origin. Although the majority of them are benign in nature, up to 10% can be malignant. The symptoms depend on the site, size, and structures compressed by the tumor. AIM To highlight the heterogeneity of signs and symptoms and their presentations, which has often made it difficult for the attending physician to accurately diagnose and direct the patient toward appropriate treatment. METHODS Eight patients treated at our tertiary care hospital between 2015 and 2022 were included in this study. They were evaluated in detail. Treatment was surgical. The patients underwent complete excision of the tumor under magnification to help preserve the adjacent neurovascular bundle. All patients were followed up post-operatively to document the status of their symptoms. RESULTS The average duration prior to referral to our hospital was 13 months. Seven subjects had pain at presentation, one had neurological deficit. Seven also complained of swelling. Five of the eight lesions were schwannoma, two neurofibroma and one showed malignant histology. Post-operatively, Hoffman Tinel signs improved in all six subjects. five of the seven subjects were completely pain-free, and the other two had a reduction in symptoms. CONCLUSIONS Early diagnosis and referral to a specialist center are needed to achieve satisfactory outcomes while treating peripheral nerve tumors. Proliferative lesions should be treated surgically in specialist centers by experienced doctors with appropriate skills and equipment for microsurgical procedures to ensure full recovery.
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Affiliation(s)
| | - Chandni Shankar
- Plastic and Reconstructive Surgery, Yenepoya Medical College, Mangalore, IND
| | - Shruti G Raikar
- Plastic and Reconstructive Surgery, Yenepoya Medical College, Mangalore, IND
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Özden C, Mautner VF, Farschtschi S, Molwitz I, Ristow I, Bannas P, Well L, Klutmann S, Adam G, Apostolova I, Buchert R. Asymmetry of thalamic hypometabolism on FDG-PET/CT in neurofibromatosis type 1: Association with peripheral tumor burden. J Neuroimaging 2024; 34:138-144. [PMID: 37942683 DOI: 10.1111/jon.13170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Revised: 10/15/2023] [Accepted: 10/30/2023] [Indexed: 11/10/2023] Open
Abstract
BACKGROUND AND PURPOSE Thalamic hypometabolism is a consistent finding in brain PET with F-18 fluorodeoxyglucose (FDG) in patients with neurofibromatosis type 1 (NF1). However, the pathophysiology of this metabolic alteration is unknown. We hypothesized that it might be secondary to disturbance of peripheral input to the thalamus by NF1-characteristic peripheral nerve sheath tumors (PNSTs). To test this hypothesis, we investigated the relationship between thalamic FDG uptake and the number, volume, and localization of PNSTs. METHODS This retrospective study included 22 adult NF1 patients (41% women, 36.2 ± 13.0 years) referred to whole-body FDG-PET/contrast-enhanced CT for suspected malignant transformation of PNSTs and 22 sex- and age-matched controls. Brain FDG uptake was scaled voxelwise to the individual median uptake in cerebellar gray matter. Bilateral mean and left-right asymmetry of thalamic FDG uptake were determined using a left-right symmetric anatomical thalamus mask. PNSTs were manually segmented in contrast-enhanced CT. RESULTS Thalamic FDG uptake was reduced in NF1 patients by 2.0 standard deviations (p < .0005) compared to controls. Left-right asymmetry was increased by 1.3 standard deviations (p = .013). Thalamic hypometabolism was higher in NF1 patients with ≥3 PNSTs than in patients with ≤2 PNSTs (2.6 vs. 1.6 standard deviations, p = .032). The impact of the occurrence of paraspinal/paravertebral PNSTs and of the mean PNST volume on thalamic FDG uptake did not reach statistical significance (p = .098 and p = .189). Left-right asymmetry of thalamic FDG uptake was not associated with left-right asymmetry of PNST burden (p = .658). CONCLUSIONS This study provides first evidence of left-right asymmetry of thalamic hypometabolism in NF1 and that it might be mediated by NF1-associated peripheral tumors.
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Affiliation(s)
- Cansu Özden
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Victor-Felix Mautner
- Department of Neurology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Said Farschtschi
- Department of Neurology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Isabel Molwitz
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Inka Ristow
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Peter Bannas
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Lennart Well
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Susanne Klutmann
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Gerhard Adam
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Ivayla Apostolova
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Ralph Buchert
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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Uno K, Teoh SH, Sekiguchi K, Suzuki-Kemuriyama N, Ohta T, Miyajima K. Granulomatous Myocarditis Caused by Candida Spp Infection in a Spontaneously Diabetic Torii Rat. Med Arch 2024; 78:177-179. [PMID: 38566880 PMCID: PMC10983084 DOI: 10.5455/medarh.2024.78.177-179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Accepted: 03/05/2024] [Indexed: 04/04/2024] Open
Abstract
Background Myocarditis refers to myocardial inflammation with necrosis caused by non-infectious of infectious agents such as bacteria, fungi, or drugs. Candida is known to cause myocarditis in healthy and immunocompromised individuals. Diabetes mellitus causes chronic hyperglycemia due to impaired secretion or hypofunction of insulin, induces a compromised state, and increases the risk of contracting various infections. Objective We report a case of granulomatous myocarditis caused by Candida in a Spontaneously Diabetic Torii rat, a non-obese diabetic model. Case report A male SDT rat, 61 weeks of age, was housed in conventional environment. The rat was provided a commercial diet and tap water ad libitum. The heart was sampled and prepared the specimen of hematoxylin-and-eosin-, Sirius-red-, Giemsa-, Grocott-stain. Histologically, formation of large granulation tissue was observed in the left ventricular wall. A center of the foci showed necrosis. Moreover, inflammatory cells infiltration and fibrous component were increased surrounding the foci and between myocardial cells. A Grocott and Giemsa staining-positive cell masses occasionally appearing in the foci were considered to be Candida because of their characteristic form. Conclusion The development and progression of myocarditis were potentially related to a diabetes-induced compromised state.
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Affiliation(s)
- Kinuko Uno
- Laboratory of Animal Physiology and Functional Anatomy, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
- Department of Nutritional Science and Food Safety, Faculty of Applied Biosciences, Tokyo University of Agriculture, Tokyo, Japan
| | - Soon Hui Teoh
- Department of Nutritional Science and Food Safety, Faculty of Applied Biosciences, Tokyo University of Agriculture, Tokyo, Japan
| | - Keita Sekiguchi
- Department of Nutritional Science and Food Safety, Faculty of Applied Biosciences, Tokyo University of Agriculture, Tokyo, Japan
| | - Noriko Suzuki-Kemuriyama
- Department of Nutritional Science and Food Safety, Faculty of Applied Biosciences, Tokyo University of Agriculture, Tokyo, Japan
| | - Takeshi Ohta
- Laboratory of Animal Physiology and Functional Anatomy, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Katsuhiro Miyajima
- Department of Nutritional Science and Food Safety, Faculty of Applied Biosciences, Tokyo University of Agriculture, Tokyo, Japan
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Al-Alwan M, Noar GA, AL-Alwan A, Alrwabdeh S, Etawi M. Sporadic Malignant Triton Tumor of Shoulder: a Case Report. Med Arch 2024; 78:174-176. [PMID: 38566863 PMCID: PMC10983085 DOI: 10.5455/medarh.2024.78.174-176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Accepted: 03/05/2024] [Indexed: 04/04/2024] Open
Abstract
Background Malignant triton tumors (MTT) are subtype of malignant peripheral nerve sheath tumor (MPNST) which develop from Schwan cells of peripheral nerves or within neurofibromas, and shows rhabdomyoblastic differentiation. It is a rare soft tissue tumor with poor prognosis. Objective We report a case of Malignant Triton Tumor (MTT) arising in the right shoulder in a 46 year old male patient presented to our Musculoskeletal Oncology Clinic at Royal Rehabilitation center at King Hussein Medical Center during June 2018. Case presentation The patient was complaining of an 8 months long progressive right shoulder pain and swelling at the posterior lateral area of the shoulder. As accurate diagnosis is crucial in such case, investigations that included x-rays and magnetic resonance imaging (MRI) demonstrated an soft tissue tumor involving the right shoulder area leading to the differential diagnosis of aggressive soft tissue tumor which laid down the plan of an open incisional biopsy to be reported histopathological as a case of Malignant Triton Tumor which is a very rare and aggressive sarcoma originates from the peripheral nerve sheaths as it is subtype of malignant peripheral nerve sheath tumors after which excision of the entire tumor with safety margin was performed and referred for adjuvant chemotherapy. Conclusion The treatment of choice is radical tumor excision with wide margins followed by chemotherapy and /or radiotherapy to improve the 5 years survival rates.
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Affiliation(s)
- Mohammad Al-Alwan
- Orthopedic Department at Royal Rehabilitation Center at King Hussein Medical Center, Amman, Jordan
| | - Ghaith Abu Noar
- Orthopedic Department at Royal Rehabilitation Center at King Hussein Medical Center, Amman, Jordan
| | - Ayat AL-Alwan
- Radiology Department at King Hussein Medical Center, Amman, Jordan
| | - Sura Alrwabdeh
- Histopathology Department at King Hussein Medical Center, Amman, Jordan
| | - Mahmood Etawi
- Orthopedic Department at Royal Rehabilitation Center at King Hussein Medical Center, Amman, Jordan
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Deka JB, Shah R, Jiménez M, Bhatnagar N, Bravo-Sánchez A, Piñas-Bonilla I, Abián-Vicén J, Jiménez F. A Retrospective Analysis of High Resolution Ultrasound Evaluation of the "Split Fat Sign" in Peripheral Nerve Sheath Tumors. Healthcare (Basel) 2023; 11:3147. [PMID: 38132037 PMCID: PMC10742399 DOI: 10.3390/healthcare11243147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2023] [Revised: 12/07/2023] [Accepted: 12/08/2023] [Indexed: 12/23/2023] Open
Abstract
Peripheral nerve sheath tumors (PNST) comprise schwannomas and neurofibromas. The finding of increased adipose tissue around benign PNSTs has been described as the "split fat sign" on magnetic resonance imaging exams, which is suggestive of an intramuscular or intermuscular location of the tumor. However, few studies have described this sign as a salient ultrasound feature of PNSTs. The main purpose of this study was to retrospectively evaluate the presence of increased fatty tissue deposition around benign PNSTs diagnosed by high-resolution ultrasound. In addition, we aimed to corroborate the presence of vascularization around the affected area. A retrospective analysis of ten cases of PNSTs and two cases of post-traumatic neuromas diagnosed by high-resolution ultrasound was performed with a Logiq® P8 ultrasound with a 2-11 MHz multifrequency linear probe L3-12-D (central frequency: 10 MHz). Localized types of neurofibromas and schwannomas in any location were seen as predominantly hypoechoic tumors with an oval or fusiform shape. Exiting and entering nerves (tail sign) were observed in six cases, showing localized lesions both in intermuscular and subcutaneous locations. The presence of increased hyperechoic tissue (the split fat sign) was noted in cases of solitary intermuscular and intramuscular peripheral nerve sheath tumors, mainly the schwannomas. Though small tumors did not demonstrate the tail sign, the increase in adipose tissue and vascularity on US was well demonstrated. In conclusion, the nerve in continuity forms the basis of the ultrasonographic diagnosis of PNSTs. However, high-resolution US can convincingly demonstrate the increased presence of fat in the upper and lower poles as well as circumferentially in intermuscular or intramuscular benign PNSTs.
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Affiliation(s)
- Jeena B. Deka
- Dispur Polyclinic and Hospitals Pvt. Ltd., Guwahati 781006, India;
- Faculty of Health Sciences, San Antonio Catholic University, 30107 Murcia, Spain; (N.B.); (F.J.)
| | - Ritu Shah
- Seth GS. Medical College and King Edward Memorial Hospital, Mumbai 400012, India;
| | | | - Nidhi Bhatnagar
- Faculty of Health Sciences, San Antonio Catholic University, 30107 Murcia, Spain; (N.B.); (F.J.)
- Radiology Department, Mata Devi Hospital Max Hospital, Panchsheel, New Delhi 110058, India
| | - Alfredo Bravo-Sánchez
- Facultad de Ciencias de la Salud, Universidad Francisco de Vitoria, 28223 Pozuelo de Alarcón, Spain
| | | | - Javier Abián-Vicén
- Performance and Sport Rehabilitation Laboratory (DEPORSALUD), Faculty of Sport Sciences, University of Castilla-La Mancha, 13001 Toledo, Spain
| | - Fernando Jiménez
- Faculty of Health Sciences, San Antonio Catholic University, 30107 Murcia, Spain; (N.B.); (F.J.)
- Performance and Sport Rehabilitation Laboratory (DEPORSALUD), Faculty of Sport Sciences, University of Castilla-La Mancha, 13001 Toledo, Spain
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Kao WT, Chu CY, Shen KH. Hybrid Schwannoma/Neurofibroma of the Neck: A Case Report. Ear Nose Throat J 2023:1455613231200834. [PMID: 37747125 DOI: 10.1177/01455613231200834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/26/2023] Open
Abstract
Neck hybrid schwannoma/neurofibromas are uncommon and classified as peripheral nerve sheath tumors (PNSTs). PNSTs develop from soft tissues, of which schwannoma, perineurioma, and neurofibroma are the most common. Hybrid PNSTs consist of more than 1 type of PNST, such as hybrid schwannoma/neurofibromas. The exact epidemiology and pathogenesis of these tumors are still largely unknown because of the limited studies on this topic. Such tumors can spread over the soft tissues, although most cases reported involve the subcutaneous layer or dermis. Some studies have suggested that hybrid schwannoma/neurofibromas may be associated with neurofibromatosis. We present a case of a 51-year-old female patient with a neck hybrid schwannoma/neurofibroma diagnosed by histopathology and immunohistochemistry. The patient was referred to the neurology department for neurofibromatosis screening, which reported negative results. After 12 months, the patient showed no evidence of tumor recurrence.
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Affiliation(s)
- Wei-Ting Kao
- Department of Otolaryngology and Head & Neck Surgery, Mackay Memorial Hospital, Taitung
- Department of Otolaryngology and Head & Neck Surgery, Mackay Memorial Hospital, Taipei
| | - Chia-Ying Chu
- Department of Pathology, Mackay Memorial Hospital, Taitung
| | - Kuang-Hsuan Shen
- Department of Otolaryngology and Head & Neck Surgery, Mackay Memorial Hospital, Taitung
- Department of Otolaryngology and Head & Neck Surgery, Mackay Memorial Hospital, Taipei
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7
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Kresbach C, Dottermusch M, Eckhardt A, Ristow I, Paplomatas P, Altendorf L, Wefers AK, Bockmayr M, Belakhoua S, Tran I, Pohl L, Neyazi S, Bode H, Farschtschi S, Well L, Friedrich RE, Reuss D, Snuderl M, Hagel C, Mautner VF, Schüller U. Atypical neurofibromas reveal distinct epigenetic features with proximity to benign peripheral nerve sheath tumor entities. Neuro Oncol 2023; 25:1644-1655. [PMID: 36866403 PMCID: PMC10479771 DOI: 10.1093/neuonc/noad053] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Indexed: 03/04/2023] Open
Abstract
BACKGROUND Plexiform neurofibromas can transform into atypical neurofibromas (ANF) and then further progress to aggressive malignant peripheral nerve sheath tumors (MPNST). ANF have been described to harbor distinct histological features and frequent loss of CDKN2A/B. However, histological evaluation may be rater-dependent, and detailed knowledge about the molecular mechanisms of malignant transformation is scarce. In general, malignant transformation can be accompanied by significant epigenetic changes, and global DNA methylation profiling is able to differentiate relevant tumor subgroups. Therefore, epigenetic profiling might provide a valuable tool to distinguish and characterize ANF with differing extent of histopathological atypia from neurofibromas and MPNST. METHODS We investigated 40 tumors histologically diagnosed as ANF and compared their global methylation profile to other peripheral nerve sheath tumors. RESULTS Unsupervised class discovery and t-SNE analysis indicated that 36/40 ANF cluster with benign peripheral nerve sheath tumors with clear separation from MPNST. 21 ANF formed a molecularly distinct cluster in proximity to schwannomas. Tumors in this cluster had a frequent heterozygous or homozygous loss of CDKN2A/B and significantly more lymphocyte infiltration than MPNST, schwannomas, and NF. Few ANF clustered closely with neurofibromas, schwannomas, or MPNST, raising the question, whether diagnosis based on histological features alone might pose a risk to both over- and underestimate the aggressiveness of these lesions. CONCLUSIONS Our data suggest that ANF with varying histological morphology show distinct epigenetic similarities and cluster in proximity to benign peripheral nerve sheath tumor entities. Future investigations should pay special respect to correlating this methylation pattern to clinical outcomes.
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Affiliation(s)
- Catena Kresbach
- Department of Diagnostics, Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Germany
- Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Research Institute Children’s Cancer Center, Hamburg, Germany
- Mildred Scheel Cancer Career Center HaTriCS4, University Medical Center Hamburg- Eppendorf, Hamburg, Germany
| | - Matthias Dottermusch
- Department of Diagnostics, Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Germany
| | - Alicia Eckhardt
- Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Research Institute Children’s Cancer Center, Hamburg, Germany
- Lab of Radiobiology & Experimental Radiation Oncology, Hubertus Wald Tumorzentrum, University Cancer Center Hamburg, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Inka Ristow
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Petros Paplomatas
- Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Research Institute Children’s Cancer Center, Hamburg, Germany
| | - Lea Altendorf
- Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Research Institute Children’s Cancer Center, Hamburg, Germany
| | - Annika K Wefers
- Department of Diagnostics, Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Germany
- Mildred Scheel Cancer Career Center HaTriCS4, University Medical Center Hamburg- Eppendorf, Hamburg, Germany
| | - Michael Bockmayr
- Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Research Institute Children’s Cancer Center, Hamburg, Germany
- Mildred Scheel Cancer Career Center HaTriCS4, University Medical Center Hamburg- Eppendorf, Hamburg, Germany
- Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institute of Pathology, Berlin, Germany
| | - Sarra Belakhoua
- Department of Pathology, NYU Langone Health and School of Medicine, New York, New York, USA
| | - Ivy Tran
- Department of Pathology, NYU Langone Health and School of Medicine, New York, New York, USA
| | - Lara Pohl
- Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Research Institute Children’s Cancer Center, Hamburg, Germany
| | - Sina Neyazi
- Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Research Institute Children’s Cancer Center, Hamburg, Germany
| | - Helena Bode
- Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Research Institute Children’s Cancer Center, Hamburg, Germany
| | - Said Farschtschi
- Department of Neurology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Lennart Well
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Reinhard E Friedrich
- Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - David Reuss
- Department of Neuropathology, University of Heidelberg, Heidelberg, Germany
| | - Matija Snuderl
- Department of Pathology, NYU Langone Health and School of Medicine, New York, New York, USA
| | - Christian Hagel
- Department of Diagnostics, Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Germany
| | - Victor-Felix Mautner
- Department of Neurology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Ulrich Schüller
- Department of Diagnostics, Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Germany
- Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Research Institute Children’s Cancer Center, Hamburg, Germany
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Palamar D, Akgün K, Özekli Mısırlıoğlu T, Terlemez R, Aydın A, Erdemir Kızıltan M. An unusual cause of posterior interosseous nerve palsy and contribution of ultrasonography to electromyography in a patient with neurofibroma. Turk J Phys Med Rehabil 2023; 69:380-384. [PMID: 37674802 PMCID: PMC10478550 DOI: 10.5606/tftrd.2023.9881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 12/20/2021] [Indexed: 09/08/2023] Open
Abstract
Neurofibroma, a benign peripheral nerve sheath tumor, represents a rare cause of posterior interosseous nerve syndrome. Electrodiagnostic studies may not identify the exact site of nerve compression, a possible lesion that compresses the nerve and do not provide information about the morphological changes. Ultrasound is a cost-effective, practical modality that provides the opportunity for dynamic tracking in the peripheral nerves, and it is widely considered as the initial imaging modality for peripheral nerves. Herein, we report a case of posterior interosseous nerve palsy in a 13-year-old boy with neurofibroma of posterior interosseous nerve diagnosed with ultrasound. The benefit of ultrasound in localizing and determining the etiology of the posterior interosseous nerve palsy is emphasized in this case report. A meticulous ultrasound examination is recommended in suspected peripheral nerve lesions, regardless of the results of electrophysiological and imaging modalities.
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Affiliation(s)
- Deniz Palamar
- Department of Physical Medicine and Rehabilitation, Istanbul University Cerrahpaşa, Cerrahpaşa Faculty of Medicine, Istanbul, Türkiye
| | - Kenan Akgün
- Department of Physical Medicine and Rehabilitation, Istanbul University Cerrahpaşa, Cerrahpaşa Faculty of Medicine, Istanbul, Türkiye
| | - Tuğçe Özekli Mısırlıoğlu
- Department of Physical Medicine and Rehabilitation, Istanbul University Cerrahpaşa, Cerrahpaşa Faculty of Medicine, Istanbul, Türkiye
| | - Rana Terlemez
- Department of Physical Medicine and Rehabilitation, Istanbul University Cerrahpaşa, Cerrahpaşa Faculty of Medicine, Istanbul, Türkiye
| | - Atakan Aydın
- Department of Plastic, Reconstructive and Aesthetic Surgery, Istanbul University Cerrahpaşa, Cerrahpaşa Faculty of Medicine, Istanbul, Türkiye
| | - Meral Erdemir Kızıltan
- Department of Neurology, Istanbul University Cerrahpaşa, Cerrahpaşa Faculty of Medicine, Istanbul, Türkiye
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Rahouma M, Baudo M, Khairallah S, Dabsha A, Tafuni A, El-Sayed Ahmed MM, Lau C, Iannacone E, Naka Y, Girardi L, Gaudino M, Lorusso R, Mick SL. Primary Cardiac Schwannoma: A Meta-Analysis of Individual Case Reports. J Clin Med 2023; 12:jcm12103356. [PMID: 37240461 DOI: 10.3390/jcm12103356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 04/27/2023] [Accepted: 05/05/2023] [Indexed: 05/28/2023] Open
Abstract
Primary cardiac schwannoma (PCS) is a neurogenic tumor that arises from Schwann cells. Malignant schwannoma (MSh) is an aggressive cancer comprising 2% of all sarcomas. Information on the proper management of these tumors is limited. Four databases were searched for case reports/series of PCS. The primary outcome was overall survival (OS). Secondary outcomes included therapeutic strategies and the corresponding outcomes. Among 439 potentially eligible studies, 53 met the inclusion criteria. The patients included had 43.72 ± 17.76 years and 28.3% were males. Over 50% of patients had MSh, with 9.4% also demonstrating metastases. Schwannoma commonly occurs in the atria (66.0%). Left-sided PCS were more common than right-sided ones. Surgery was performed in almost 90% of the cases; chemotherapy and radiotherapy were used in 16.9% and 15.1% of cases, respectively. Compared to benign cases, MSh occurs at a younger age and is commonly located on the left side. OS of the entire cohort at 1 and 3 years were 60.7%, and 54.0%, respectively. Females and males OS were similar up to 2 years follow-up. Surgery was associated with higher OS (p < 0.01). Surgery is the primary treatment option for both benign and malignant cases and was the only factor associated with a relative improvement in survival.
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Affiliation(s)
- Mohamed Rahouma
- Cardiothoracic Surgery Department, Weill Cornell Medicine, New York, NY 10065, USA
- Surgical Oncology Department, National Cancer Institute, Cairo University, Cairo 11796, Egypt
| | - Massimo Baudo
- Cardiothoracic Surgery Department, Weill Cornell Medicine, New York, NY 10065, USA
- Cardiac Surgery Department, Spedali Civili di Brescia, University of Brescia, 25123 Brescia, Italy
| | - Sherif Khairallah
- Cardiothoracic Surgery Department, Weill Cornell Medicine, New York, NY 10065, USA
- Surgical Oncology Department, National Cancer Institute, Cairo University, Cairo 11796, Egypt
| | - Anas Dabsha
- Cardiothoracic Surgery Department, Weill Cornell Medicine, New York, NY 10065, USA
- Surgical Oncology Department, National Cancer Institute, Cairo University, Cairo 11796, Egypt
| | - Alessandro Tafuni
- Unit of Pathology, Department of Medicine and Surgery, University of Parma, 43126 Parma, Italy
| | - Magdy M El-Sayed Ahmed
- Cardiothoracic Surgery Department, Mayo Clinic, Jacksonville, FL 32224, USA
- Department of Surgery, Faculty of Medicine, Zagazig University, Zagazig 44519, Egypt
| | - Christopher Lau
- Cardiothoracic Surgery Department, Weill Cornell Medicine, New York, NY 10065, USA
| | - Erin Iannacone
- Cardiothoracic Surgery Department, Weill Cornell Medicine, New York, NY 10065, USA
| | - Yoshifumi Naka
- Cardiothoracic Surgery Department, Weill Cornell Medicine, New York, NY 10065, USA
| | - Leonard Girardi
- Cardiothoracic Surgery Department, Weill Cornell Medicine, New York, NY 10065, USA
| | - Mario Gaudino
- Cardiothoracic Surgery Department, Weill Cornell Medicine, New York, NY 10065, USA
| | - Roberto Lorusso
- Department of Cardio-Thoracic Surgery, Maastricht University Medical Centre, Maastricht University, 6202 AZ Maastricht, The Netherlands
- Cardiovascular Research Institute Maastricht, 6229 ER Maastricht, The Netherlands
| | - Stephanie L Mick
- Cardiothoracic Surgery Department, Weill Cornell Medicine, New York, NY 10065, USA
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Uy BR, Sun MZ, Muftuoglu Y, Cheng M, Kim WJ, Magaki S, Yoo BY, Salehi B, Beckett JS, Macyszyn L. Upper lumbar spine far lateral disc herniations masquerading as peripheral nerve sheath tumors: illustrative cases. J Neurosurg Case Lessons 2023; 5:CASE22552. [PMID: 37014005 PMCID: PMC10555549 DOI: 10.3171/case22552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 02/14/2023] [Indexed: 04/05/2023]
Abstract
BACKGROUND Migratory disc herniations can mimic neoplasms clinically and on imaging. Far lateral lumbar disc herniations usually compress the exiting nerve root and can be challenging to distinguish from a nerve sheath tumor due to the proximity of the nerve and characteristics on magnetic resonance imaging (MRI). These lesions can occasionally present in the upper lumbar spine region at the L1-2 and L2-3 levels. OBSERVATIONS The authors describe 2 extraforaminal lesions in the far lateral space at the L1-2 and L2-3 levels, respectively. On MRI, both lesions tracked along the corresponding exiting nerve roots with avid postcontrast rim enhancement and edema in the adjacent muscle tissue. Thus, they were initially concerning for peripheral nerve sheath tumors. One patient underwent fluorodeoxyglucose positron emission tomography-computed tomography (FDG PET-CT) screening and demonstrated moderate FDG uptake on PET-CT scan. In both cases, intraoperative and postoperative pathology revealed fibrocartilage disc fragments. LESSONS Differential diagnosis for lumbar far lateral lesions that are peripherally enhancing on MRI should include migratory disc herniation, regardless of the level of the disc herniations. Accurate preoperative diagnosis can aid in decision making for management, surgical approach, and resection.
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Abstract
Schwannomas are one of the most common peripheral nerve sheath neoplasms. These tumors, which are characteristically slow-growing and encapsulated, can occur in solitary or multiple forms. Although they usually occur sporadically, they can be seen with various genetic tumor predisposition syndromes such as neurofibromatosis type 2 (NF-2) or schwannomatosis. However, schwannomatosis is a relatively rare disease. We present a case of a 22-year-old patient with segmental schwannomatosis of the sciatic nerve and a comprehensive literature review.
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Affiliation(s)
- Furkan Erdoğan
- Department of Orthopedics and Traumatology, Ondokuz Mayis University Faculty of Medicine, Samsun, Turkey
| | - Ferhat Say
- Department of Orthopedics and Traumatology, Ondokuz Mayis University Faculty of Medicine, Samsun, Turkey
| | - Yakup Sancar Barış
- Department of Pathology, Ondokuz Mayis University Faculty of Medicine, Samsun, Turkey
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Nazzi V, Innocenti N, Castelli N, Tramacere I, Eoli M, Cojazzi V, Gatti L, Acerbi F, Falco J, Vetrano IG. Assessing the role of sodium fluorescein in peripheral nerve sheath tumors and mimicking lesions surgery: An update after 142 cases. Front Oncol 2023; 12:1070878. [PMID: 36698394 PMCID: PMC9868923 DOI: 10.3389/fonc.2022.1070878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Accepted: 12/12/2022] [Indexed: 01/12/2023] Open
Abstract
Objective Peripheral nerve sheath tumors (PNST) include mainly schwannomas and neurofibromas. Surgical resection represents the mainstay of treatment but due to their pathogenesis, distinguishing between intact functional nerve and the fibers from whence the PNST arose may not always be easy to perform, constituting the most relevant risk factor in determining a worsening in neurological condition. The introduction of intraoperative tools to better visualize these tumors could help achieve a gross-total resection. In this study, we analyzed the effect of sodium fluorescein (SF) on the visualization and resection of a large cohort of PNST. Methods Between September 2018 and December 2021, 142 consecutive patients harboring a suspected PNST underwent fluorescein-guided surgery at the Department of Neurosurgery of the Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy. All patients presented with a different degree of contrast enhancement at preoperative MRI. SF was intravenously injected after intubation at 1 mg/kg. Intraoperative fluorescein characteristics and postoperative neurological and radiological outcomes were collected, analyzed, and retrospectively compared with a historical series. Results 142 patients were included (42 syndromic and 100 sporadic); schwannoma was the predominant histology, followed by neurofibroma (17 neurofibroma e 12 plexiform neurofibroma) and MPNST. Bright fluorescence was present in all cases of schwannomas and neurofibromas, although with a less homogeneous pattern, whereas it was significantly less evident for malignant PNST; perineurioma and hybrid nerve sheath tumors were characterized by a faint fluorescence enhancement. The surgical resection rate in the general population and even among the subgroups was about 66.7%; from the comparative analysis, we found a consistently higher rate of complete tumor removal in plexiform neurofibromas, 66% in the "fluorescent" group vs 44% in the "historical" group (p-value < 0.05). The rate of complications and mean surgical time were superimposable among the two populations. Conclusions SF is a valuable method for safe fluorescence-guided PNST and mimicking lesions resection. Our data showed a positive effect of fluorescein-guided surgery in increasing the rate of surgical resection of plexiform neurofibromas, suggesting a possible role in improving the functional and oncological outcome of these lesions.
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Affiliation(s)
- Vittoria Nazzi
- Department of Neurosurgery, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Niccolò Innocenti
- Department of Neurosurgery, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Nicolò Castelli
- Department of Neurosurgery, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Irene Tramacere
- Department of Research and Clinical Development, Scientific Directorate, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Marica Eoli
- Molecular Neuro-Oncology Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Vittoria Cojazzi
- Department of Neurosurgery, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Laura Gatti
- Neurobiology Laboratory, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Francesco Acerbi
- Department of Neurosurgery, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Jacopo Falco
- Department of Neurosurgery, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Ignazio G. Vetrano
- Department of Neurosurgery, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy,Neurobiology Laboratory, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy,Department of Biomedical Sciences for Health, Università degli Studi di Milano, Milan, Italy,*Correspondence: Ignazio G. Vetrano,
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Castiglioni V, Caielli C, Guenzi G, Sacchini F. Cutaneous spindle cell tumors with features of peripheral nerve sheath tumors and concurrent cardiac involvement: neurofibromatosis type 1-like presentation in a Labrador Retriever dog. J Vet Diagn Invest 2022; 34:535-538. [PMID: 35291897 PMCID: PMC9254057 DOI: 10.1177/10406387221081435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
An 8-y-old intact male Labrador Retriever dog developed cutaneous masses over the entire body. On histologic evaluation, the masses were composed of bundles of fusiform neoplastic cells arranged around adnexa, with mild atypia and no mitoses, consistent with peripheral nerve sheath tumors (PNSTs). Immunohistochemically, neoplastic cells were immunoreactive for vimentin, glial fibrillary acidic protein (GFAP), and S100, confirming their perineurial origin. The dog was euthanized because of deteriorating clinical signs. In addition to the cutaneous masses, a cardiac mass was identified at postmortem examination. The histopathologic and immunohistochemical features of the cardiac mass were similar to those of the cutaneous masses. To our knowledge, the combination of multiple cutaneous masses with features of PNSTs and a concurrent cardiac lesion has not been reported previously in a dog. We suggest "neurofibromatosis type 1-like" presentation for this unique combination of cutaneous and cardiac masses. Further studies are required to investigate the etiopathogenesis of this condition and explore its genetic background.
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Affiliation(s)
| | - Carla Caielli
- Clinica Veterinaria Monte Rosa, Castelletto Sopra Ticino (NO), Italy
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Zipfel J, Al-Hariri M, Gugel I, Grimm A, Steger V, Ladurner R, Krimmel M, Tatagiba M, Schuhmann MU. Surgical Management of Sporadic Peripheral Nerve Schwannomas in Adults: Indications and Outcome in a Single Center Cohort. Cancers (Basel) 2021; 13:1017. [PMID: 33804463 DOI: 10.3390/cancers13051017] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 02/20/2021] [Accepted: 02/24/2021] [Indexed: 11/16/2022] Open
Abstract
Simple Summary Peripheral nerve sheath tumors are associated with significant morbidity. Clinical presentation, tumor location, and therapeutic strategies are variable. We aim to provide high-quality data concerning the results of interdisciplinary operative approaches for surgical resection of schwannomas. Understanding the anatomical and functional challenges of surgical interventions in the peripheral nervous system can help to enhance the outcomes of these therapies. We aim to highlight the need for interdisciplinarity and provide evidence for both excellent functional outcomes, as well as improved quality of life for patients undergoing sporadic schwannoma surgery. Abstract Most sporadic peripheral nerve sheath tumors in adults are schwannomas. These tumors usually present with significant pain but can also cause neurological deficits. Symptomatology is diverse, and successful surgical interventions demand interdisciplinarity. We retrospectively reviewed 414 patients treated between 2006 and 2017 for peripheral nerve sheath tumors. We analyzed clinical signs, symptoms, histology, and neurological function in the cohort of adult patients with schwannomas without a neurocutaneous syndrome. In 144 patients, 147 surgical interventions were performed. Mean follow-up was 3.1 years. The indication for surgery was pain (66.0%), neurological deficits (23.8%), significant tumor growth (8.8%), and suspected malignancy (1.4%). Complete tumor resection was achieved on 136/147 occasions (92.5%). The most common location of the tumors was intraspinal (49.0%), within the cervical neurovascular bundles (19.7%), and lower extremities (10.9%). Pain and neurological deficits improved significantly (p ≤ 0.003) after 131/147 interventions (89.1%). One patient had a persistent decrease in motor function after surgery. Complete resection was possible in 67% of recurrent tumors, compared to 94% of primary tumors. There was a significantly lower chance of complete resection for schwannomas of the cervical neurovascular bundle as compared to other locations. The surgical outcome of sporadic schwannoma surgery within the peripheral nervous system is very favorable in experienced peripheral nerve surgery centers. Surgery is safe and effective and needs a multidisciplinary setting. Early surgical resection in adult patients with peripheral nerve sheath tumors with significant growth, pain, neurological deficit, or suspected malignancy is thus recommended.
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Tøttrup M, Eriksen JD, Hellfritzsch MB, Sørensen FB, Baad-Hansen T. Diagnostic accuracy of ultrasound-guided core biopsy of peripheral nerve sheath tumors. J Clin Ultrasound 2020; 48:134-138. [PMID: 31441068 DOI: 10.1002/jcu.22769] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 07/15/2019] [Accepted: 07/31/2019] [Indexed: 06/10/2023]
Abstract
PURPOSE To retrospectively evaluate the diagnostic accuracy of and complications from ultrasound-guided core needle biopsy (UGCNB) of suspected peripheral nerve sheath tumors (PNSTs). METHODS Patients undergoing UGCNB from January 2004 to December 2016, based on the suspicion of PNST, were included in the study. Age, gender, anatomical location, dates of relevant events, and histopathological reports of the UGCNB cores and the resected tumors were retrieved from the patients' medical records. RESULTS A total of 154 UGCNBs were identified. One hundred and forty (90.9%) of these resulted in a conclusive histopathological report, while 14 were unsuited for histopathological analysis due to insufficient amount of tissue and/or nonrepresentative tissue. The overall diagnostic accuracy of UGCNB with respect to discriminate malignant from benign tumors was 99.3%, while correct specific UGCNB diagnoses were confirmed in 95.1% of the cases. Sensitivity and specificity were 90.9% (95% CI: 58.7-99.8%) and 100% (95% CI: 97.2-100%), respectively. The positive predictive value was 100%, and the negative predictive value was 99.2%. Except for one patient, who reported mild dysesthesia, which resolved 2 days after the UGCNB, no complications were reported. CONCLUSION This study suggests that UGCNB is accurate and safe in patients suspected for PNST.
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Affiliation(s)
- Mikkel Tøttrup
- Department of Orthopaedic Surgery, Aarhus University Hospital, Aarhus, Denmark
| | - Jacob D Eriksen
- Department of Surgery, Aarhus University Hospital, Aarhus, Denmark
| | | | - Flemming B Sørensen
- University Institute of Pathology, Aarhus University Hospital, Aarhus, Denmark
| | - Thomas Baad-Hansen
- Department of Orthopaedic Surgery, Aarhus University Hospital, Aarhus, Denmark
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Abstract
INTRODUCTION Neurofibromatosis type 1 (NF1) is an autosomal dominantly inherited tumor predisposition syndrome with an incidence of one in 3000-4000 individuals with no currently effective therapies. The NF1 gene encodes neurofibromin, which functions as a negative regulator of RAS. NF1 is a chronic multisystem disorder affecting many different tissues. Due to cell-specific complexities of RAS signaling, therapeutic approaches for NF1 will likely have to focus on a particular tissue and manifestation of the disease. Areas covered: We discuss the multisystem nature of NF1 and the signaling pathways affected due to neurofibromin deficiency. We explore the cell-/tissue-specific molecular and cellular consequences of aberrant RAS signaling in NF1 and speculate on their potential as therapeutic targets for the disease. We discuss recent genomic, transcriptomic, and proteomic studies combined with molecular, cellular, and biochemical analyses which have identified several targets for specific NF1 manifestations. We also consider the possibility of patient-specific gene therapy approaches for NF1. Expert opinion: The emergence of NF1 genotype-phenotype correlations, characterization of cell-specific signaling pathways affected in NF1, identification of novel biomarkers, and the development of sophisticated animal models accurately reflecting human pathology will continue to provide opportunities to develop therapeutic approaches to combat this multisystem disorder.
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Affiliation(s)
- James A Walker
- a Center for Genomic Medicine , Massachusetts General Hospital, Harvard Medical School , Boston , MA , USA
| | - Meena Upadhyaya
- b Division of Cancer and Genetics , Cardiff University , Cardiff , UK
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Abstract
Extra-axial brain tumors are the most common adult intracranial neoplasms and encompass a broad spectrum of pathologic subtypes. Meningiomas are the most common extra-axial brain tumor (approximately one-third of all intracranial neoplasms) and typically present as slowly growing dural-based masses. Benign meningiomas are very common, and may occasionally be difficult to differentiate from more aggressive subtypes (i.e., atypical or malignant varieties) or other dural-based masses with more aggressive biologic behavior (e.g., hemangiopericytoma or dural-based metastases). Many neoplasms that typically affect the brain parenchyma (intra-axial), such as gliomas, may also present with primary or secondary extra-axial involvement. This chapter provides a general and concise overview of the common types of extra-axial tumors and their typical imaging features.
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Affiliation(s)
- Otto Rapalino
- Division of Neuroradiology, Department of Radiology, Massachusetts General Hospital, Boston, MA, USA.
| | - James G Smirniotopoulos
- Department of Radiology and Radiological Sciences, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
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Abstract
Brain tumors are relatively rare but deadly cancers, and present challenges in the determination of risk factors in the population. These tumors are inherently difficult to cure because of their protected location in the brain, with surgery, radiation and chemotherapy options carrying potentially lasting morbidity for patients and incomplete cure of the tumor. The development of methods to prevent or detect brain tumors at an early stage is extremely important to reduce damage to the brain from the tumor and the therapy. Developing effective prevention or early detection methods requires a deep understanding of the risk factors for brain tumors. This review explores the difficulties in assessing risk factors in rare diseases such as brain tumors, and discusses how mouse models of cancer can aid in a better understanding of genetic risk factors for brain tumors.
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Affiliation(s)
- Karlyne M Reilly
- Mouse Cancer Genetics Program, National Cancer Institute-Frederick, Frederick, MD 21702, USA.
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