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Çetin MN, Şirin YS, Milletsever A, Şirin MY, Ipek V. Malignant peripheral nerve sheath tumour of the cerebellopontine angle in a cat. J Small Anim Pract 2024. [PMID: 38469679 DOI: 10.1111/jsap.13714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 11/27/2023] [Accepted: 02/07/2024] [Indexed: 03/13/2024]
Abstract
Malignant peripheral nerve sheath tumour is an uncommon tumour in cats. The current case report aims to present the diagnosis, treatment and histopathology of a malignant peripheral nerve sheath tumour that developed in the cerebellopontine angle region of a cat. A 4-year-old 4.2-kg female calico cat was brought to the animal hospital with the complaints of loss of balance, leaning against the wall and behavioural changes. During the neurological examination, the patient was observed to have a right-sided head tilt accompanied by ipsilateral ventral strabismus. On magnetic resonance imaging scan, a mass was identified at the right cerebellopontine angle. The surgical removal of the mass was carried out using a caudo-tentorial approach. The histopathological analysis revealed the presence of a malignant peripheral nerve sheath tumour. This case report contributes to the existing knowledge in the field presenting the characteristics of a malignant peripheral nerve tumour that was not associated with any nerve in the cerebellopontine angle in a cat.
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Affiliation(s)
- M N Çetin
- Department of Surgery, Faculty of Veterinary Medicine, Burdur Mehmet Akif Ersoy University, Burdur, Turkey
| | - Y S Şirin
- Department of Surgery, Faculty of Veterinary Medicine, Burdur Mehmet Akif Ersoy University, Burdur, Turkey
| | - A Milletsever
- Department of Pathology, Faculty of Veterinary Medicine, Burdur Mehmet Akif Ersoy University, Burdur, Turkey
| | - M Y Şirin
- Department of Surgery, Faculty of Veterinary Medicine, Burdur Mehmet Akif Ersoy University, Burdur, Turkey
| | - V Ipek
- Department of Pathology, Faculty of Veterinary Medicine, Burdur Mehmet Akif Ersoy University, Burdur, Turkey
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Yeole U, Rao KVLN, Beniwal M, Sivakoti S, Santosh V, Somanna S. Cranial and Spinal Malignant Peripheral Nerve Sheath Tumor: A Pathological Enigma. J Neurosci Rural Pract 2021; 12:770-779. [PMID: 34737514 PMCID: PMC8558969 DOI: 10.1055/s-0041-1735325] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Objective
Malignant peripheral nerve sheath tumor (MPNST) arises from nerve sheaths, mostly seen in peripheral nerves but rare in craniospinal nerves. The information available in the literature to build up treatment strategy and improve clinical outcomes is scarce. We are reviewing cases from our institute, with emphasis on radiological features for early differentiation from its benign variants.
Methods
We analyzed pathologically diagnosed cases retrospectively from January 2007 to December 2018 at our institute. Clinicoradiological details and treatment parameters were collected from medical records for evaluation. Each case was contacted telephonically for final clinical follow-up at the time of writing the manuscript.
Results
A total of seven cases of MPNST were diagnosed in the last 10 years. It included four intracranial and three spinal cases. The mean age for the cohort was 34.3 years, with five females. We could achieve gross total resection (GTR) and subtotal resection in four (57.1%) and two (28.6%) cases, respectively. We could achieve an overall survival of 57.1% in the average follow-up of 28.2 months (range: 8–84 months).
Conclusion
MPNST is a rare tumor with a bad prognosis. Radical surgical resection is the mainstay of the treatment, but it is not always possible to achieve it because of the inaccessible location and large size of lesions. Preoperative diagnosis is challenging; however, few radiological findings may give a clue toward it. As a disease entity overall, it has a poor outcome with a high rate of fatality.
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Affiliation(s)
- Ujwal Yeole
- Neurosurgery Services, Department of Surgical Oncology, Tata Memorial Centre and Homi Bhabha National Institute, Mumbai, Maharashtra, India
| | - K V L Narsinga Rao
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Manish Beniwal
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Sumitra Sivakoti
- Department of Pathology and Lab Medicine, All India Institute of Medical Sciences, Nalgonda, Telangana, India
| | - Vani Santosh
- Department of Neuropathology, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Sampath Somanna
- Department of Neurosurgery, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
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Mackel CE, Medeiros I, Moore BE, Zhao Q, Jha R. Intracranial Malignant Peripheral Nerve Sheath Tumors Not Associated with a Cranial Nerve: Systematic Review and Illustrative Case. World Neurosurg 2021; 156:76-91. [PMID: 34563719 DOI: 10.1016/j.wneu.2021.09.072] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 09/14/2021] [Accepted: 09/15/2021] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Primary intracranial malignant peripheral nerve sheath tumors (MPNSTs) not associated with cranial nerves are rare and aggressive neoplasms. The rarity of presentation has precluded rigorous analysis of diagnosis, risk factors, treatment, and survival. We analyzed every reported case through exhaustive literature review. In addition, we present our own experience managed with resection, radiotherapy, and first use of targeted therapy in a tumor of this type for a BRAF mutation identified during next-generation sequencing. METHODS Two databases, PubMed and Embase, and crossed references were queried for intracranial MPNSTs not associated with a cranial nerve. Extracted variables included demographics, risk factors, tumor characteristics, interventions, and outcomes. Univariate and multivariate analysis was performed to identify factors with survival benefit. RESULTS A total of 56 patients (including the present case) were included from 743 literature results. There was a male/female ratio of 1.5:1 and mean diagnosis age of 29.7 ± 21.8 years. Seventy-one percent of cases were sporadic and 23% neurofibromatosis type 1 related. Median survival was 29 ± 22.1 months with 1-year survival of 60%. Factors associated on univariate analysis with reduced survival were subtotal resection (P = 0.05), older age (P = 0.023), triton histology (P < 0.001), and early recurrence (≤6 months) (P = 0.018). On multivariate analysis, gross total resection reduced mortality risk (P = 0.011), whereas triton histology (P = 0.017) and infratentorial tumor location (P = 0.037) increased mortality. CONCLUSIONS We present a systematic review of intracranial MPNSTs not associated with a cranial nerve. These tumors have poor prognosis and benefit from aggressive resection, multimodal treatment, and close follow-up. Next-generation sequencing can show molecular alterations for potential targeted therapy.
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Affiliation(s)
- Charles E Mackel
- Department of Neurosurgery, Beth Israel Deaconess Medical Center, Lowry Medical Office Building, Boston, Massachusetts, USA; Department of Neurosurgery, Boston Medical Center, Boston, Massachusetts, USA.
| | - Isabela Medeiros
- Department of Pathology and Laboratory Medicine, Boston Medical Center, Boston, Massachusetts, USA
| | - Brian E Moore
- Department of Pathology and Laboratory Medicine, Boston Medical Center, Boston, Massachusetts, USA
| | - Qing Zhao
- Department of Pathology and Laboratory Medicine, Boston Medical Center, Boston, Massachusetts, USA
| | - Ribhu Jha
- Department of Neurosurgery, Boston Medical Center, Boston, Massachusetts, USA
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Galzio RJ, Del Maestro M, Pagkou D, Caulo M, Asioli S, Righi A, Fabbri VP, Luzzi S. First documented case of intracranial falcine malignant peripheral nerve sheath tumor: illustrative case. JOURNAL OF NEUROSURGERY. CASE LESSONS 2021; 2:CASE21255. [PMID: 36131576 PMCID: PMC9589474 DOI: 10.3171/case21255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Accepted: 06/24/2021] [Indexed: 06/15/2023]
Abstract
BACKGROUND The authors reported the first documented case of intracranial extraaxial nonneurofibromatosis type 1-related nontriton malignant peripheral nerve sheath tumor (MPNST) originating from the falx cerebri. OBSERVATIONS A 34-year-old man with headache, short-term memory deficit, postural instability, and blurred vision presented with a large heterogenous contrast-enhanced intraventricular cystic lesion originating from the free margin of the falx cerebri. The patient received surgery using the right posterior interhemispheric approach. Gross total resection was performed, and the inferior border of the falx cerebri was resected. The postoperative course was uneventful. Histological examination revealed hypercellular foci of neoplastic spindle cells with hyperchromatic and wavy nuclei. Hence, a diagnosis of MPNST was made based on concomitant immunochemistry findings, including mouse double minute 2 homolog focal positivity and geographic loss of H3K27me3. The patient received adjuvant radiotherapy, and recurrence was not observed. LESSONS Intracranial MPNSTs are extremely rare tumors, typically originating from the cranial nerves in the posterior cranial fossa. An even rarer variant of these tumors, referred to as malignant intracerebral nerve sheath tumors, may directly arise from the brain parenchyma. The authors reported the first case of an intracranial MPNST originating from the dura mater of the falx cerebri, acting as an extraaxial lesion with prevalent expansion in the right ventricle.
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Affiliation(s)
| | | | - Diamantoula Pagkou
- Neurosurgery Unit, Department of Clinical-Surgical, Diagnostic and Pediatric Sciences, University of Pavia, Pavia, Italy
| | - Massimo Caulo
- Department of Neurosurgery, Aristotle University of Thessaloniki, AHEPA University Hospital, Thessaloniki, Greece
| | - Sofia Asioli
- Department of Neuroscience and Clinical Sciences, University of Chieti, Italy
| | - Alberto Righi
- Department of Biomedical and Neuromotor Sciences (DIBINEM)-Surgical Pathology Section, University of Bologna, Italy
| | | | - Sabino Luzzi
- Department of Pathology, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy; and
- Neurosurgery Unit, Department of Surgical Sciences, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
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Not So Benign Bell's Palsy: Malignant Peripheral Nerve Sheath Tumor of the Facial Nerve Involving the Temporal Bone. J Gen Intern Med 2021; 36:1102-1105. [PMID: 33469775 PMCID: PMC8041929 DOI: 10.1007/s11606-020-06463-0] [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: 05/26/2020] [Accepted: 12/13/2020] [Indexed: 10/22/2022]
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Cunha JLS, Tomo S, de Paiva Gomes Fernandes EK, Freitas MMD, de Almeida OP, de Andrade BAB, Soares CD, de Albuquerque-Júnior RLC. Primary intraosseous malignant peripheral nerve sheath tumor of the mandible: An unusual presentation mimicking a benign lesion. Oral Oncol 2021; 120:105266. [PMID: 33810988 DOI: 10.1016/j.oraloncology.2021.105266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 03/17/2021] [Indexed: 10/21/2022]
Abstract
The malignant peripheral nerve sheath tumor (MPNST) is a rare, aggressive malignant tumor that usually develops in the context of neurofibromatosis type 1. In the oral cavity, these tumors are excelling rare, especially in intraosseous sites. Herein, we report an unusual presentation of intraosseous MPNST affecting the mandible posterior region in a 28-year-old male without neurofibromatosis type 1 discovered as an incidental find on imaging exam. CT scan evaluation showed a solitary, well-defined, round hypodense lesion in the posterior mandibular region extending from tooth 45 to 46. Microscopic evaluation showed a tumor composed of atypical spindle-shaped cells arranged in fascicles and a storiform pattern. Tumor cells were positive for S-100 protein. Epithelial membrane antigen (EMA), pan-cytokeratin AE1/AE3, desmin, alpha-smooth muscle actin (α-SMA), HMB-45, MART-1, MUC4, and CD56 were negative. The diagnosis was low-grade MPNST. The patient underwent wide surgical resection of the tumor. After three years of follow-up, the patient remained with no evidence of recurrence or metastatic disease. When an intraosseous neurogenic tumor is suspected based on radiological characteristics, despite the apparent benign nature, an incisional biopsy is mandatory to rule out malignancy before treatment planning to avoid inadequate conservative treatment.
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Affiliation(s)
- John Lennon Silva Cunha
- Oral Pathology Section, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Brazil.
| | - Saygo Tomo
- Stomatology Department, A.C. Camargo Cancer Center, São Paulo, Brazil
| | | | - Margarite Maria Delmondes Freitas
- Laboratory of Morphology and Experimental Pathology, Institute of Technology and Research, Tiradentes University (UNIT), Aracaju, Brazil
| | - Oslei Paes de Almeida
- Oral Pathology Section, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Brazil
| | | | - Ciro Dantas Soares
- Oral Pathology Section, Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Brazil
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Surgical Management of Giant Thoracic Paraspinal Schwannomas. World Neurosurg 2021; 149:e1155-e1165. [PMID: 33516861 DOI: 10.1016/j.wneu.2020.11.174] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Revised: 11/29/2020] [Accepted: 11/30/2020] [Indexed: 11/23/2022]
Abstract
BACKGROUND Giant paraspinal thoracic schwannomas (GPTSs) are benign, slow-growing, encapsulated lesions. They can be intracanalicular, span more than 2 vertebral bodies, and/or have a foraminal component with extraspinal extension >2.5 cm. They pose surgical challenges because of the often unfamiliar complex regional anatomy. We report the largest series of GPTSs and discuss regional surgical strategies for tumors in the thoracic spine. METHODS We conducted a retrospective review of GPTSs operated at a national spinal referral center between December 2008 and October 2019. Inclusion criteria included World Health Organization grade 1 GPTS. Patient demographics, clinical features, radiology, and histopathology were assessed. RESULTS Seventeen patients (12 females, 5 males) had a mean age of 48.1 years (range 21-65 years). Five GPTS (29%) were located at T1-T3, 6 (35%) at T4-6, and 6 (35%) below T6. The mean maximum diameter was 58.5 ± 19.1 mm (range 30-91 mm). Mean volume was 90.9 cm3 (range 19.1-350.6 cm3). Twelve (70%) had a fluorodeoxyglucose positron emission tomography scan showing low (25%) or moderate to high (75%) uptake. Six patients (35%) had preoperative computed tomography-guided biopsy. Surgical approaches included 1) manubriotomy and variations (4/17); 2) high lateral thoracotomy (4/17); 3) posterior parascapular (1/17); 4) standard lateral thoracotomy (3/16); 5) posterior/posterolateral (2/17); and 6) combined posterior and thoracotomy (3/17). All patients had gross total resection and were grade 1 cellular schwannomas. No recurrence at final follow-up (mean 36.1 months, range 8-130 months). CONCLUSIONS A number of approaches are available to resect GPST in specific locations in the thoracic spine. Total resection is achievable despite complex regional anatomy, location, and tumor extension but often requires anterior or combined approaches.
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Yadav D, Shamim SA, Rastogi S, Upadhyay DMR, Pandey AK, Kumar R. Role of 18F-FDG PET/computed tomography in prognostication and management of malignant peripheral nerve sheath tumors. Nucl Med Commun 2020; 41:924-932. [PMID: 32796481 DOI: 10.1097/mnm.0000000000001237] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
AIM Malignant peripheral nerve sheath tumors (MPNSTs) are rare tumors arising from a peripheral nerve or in extraneural soft tissue which shows high metastatic potential and poor prognosis. They can arise de-novo or through malignant transformation in neurofibromatosis (NF-1). The purpose of our study is to evaluate potential role of fluorodeoxyglucose (FDG) PET/computed tomography (CT) in prognostication and management of MPNSTs. MATERIALS AND METHODS We have performed a retrospective analysis in patients of MPNSTs who underwent F-FDG PET/CT imaging for staging and restaging. Standardized uptake values (SUVmax and SUVmean) and texture parameters (calculated using radiomics package version 0.1.3) were measured for primary/recurrent lesions and were compared between two groups based on presence of event (recurrence/progression). Student t-test was applied for comparative analyses using the SPSS software package (version 23.0; IBM), with a significance level of 0.05. RESULTS Thirty patients (17 male, 13 female; mean age 42.7 ± 15.66 years) were included, who underwent F-FDG PET/CT for staging (n = 10) and restaging (n = 20). Change in management was observed in four patients at baseline and in three patients in follow-up imaging for response assessment, who had progressive disease which prompted treatment intensification. SUVmax of primary/recurrent lesion showed correlation with histopathologic grade (r = 0.712, P = 0.034). Textural analysis showed more heterogeneity in lesions in the high-risk group with recurrence and progression. CONCLUSION F-FDG PET/CT can be used for staging and restaging in MPNSTs leading to change in management. Texture analysis and quantitative F-FDG PET/CT parameters can help in prognostication at both baseline and relapse.
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Affiliation(s)
| | | | | | - D M Rituraj Upadhyay
- Department of Radiation Oncology, IRCH, All India Institute of Medical Sciences, New Delhi, India
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Thakkar K, Ramteke-Jadhav S, Kasaliwal R, Memon SS, Patil V, Thadani P, Lomte N, Sankhe S, Goel A, Epari S, Goel N, Lila A, Shah NS, Bandgar T. Sellar surprises: a single-centre experience of unusual sellar masses. Endocr Connect 2020; 9:111-121. [PMID: 31910151 PMCID: PMC6993267 DOI: 10.1530/ec-19-0497] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Accepted: 01/07/2020] [Indexed: 11/08/2022]
Abstract
BACKGROUND Most common incidentally detected sellar-suprasellar region (SSR) masses are pituitary adenomas, followed by craniopharyngioma, rathke's cleft cyst, hypophysitis, and meningioma. Besides these, certain unusual SSR lesions can sometimes present as diagnostic challenges, where diagnosis is often made post-operatively on histopathology, the pre-operative suspicion of which might have influenced the management strategies. Series describing such masses are few. OBJECTIVE To present clinical, biochemical, and radiological characteristics and management outcomes of rare SSR lesions other than pituitary adenomas, craniopharyngioma, rathke's cleft cyst, hypophysitis, and meningioma. DESIGN, SETTING, PATIENTS Retrospective case record analysis of patients with uncommon SSR masses (from January 2006 to December 2016). RESULTS Our series consisted of ten patients, five with neoplastic and five with non-neoplastic lesions. Neoplastic masses included granular cell tumor (n = 2), astrocytoma (n = 1), malignant peripheral nerve sheath tumor (MPNST, n = 1), and metastasis from occult papillary carcinoma of thyroid (n = 1), while non-neoplastic masses were aspergillus abscess (n = 1), sterile abscess (n = 1), and tubercular abscess (n = 1), aneurysm of left internal carotid artery (n = 1), and ruptured dermoid cyst (n = 1). All patients (except one) presented with headache and/or visual disturbance. Only one patient had acromegaly while most others had hypopituitarism. We describe detailed MRI characteristics of each of the lesion. Seven patients underwent trans-sphenoidal surgery. Post-operatively, five patients had permanent diabetes insipidus, while two patients died in early post-operative period. CONCLUSION Our series expand the differential diagnostic considerations of SSR lesions. Most of the rare SSR masses present with symptoms of mass effects and hypopituitarism. Except for some non-neoplastic lesions like sellar abscesses, aneurysms, and dermoid cysts which can have some specific imaging characteristics that can provide clue to pre-operative diagnosis, most of the other neoplastic masses have overlapping radiological features, and pre-operative suspicion remains difficult.
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Affiliation(s)
- Kunal Thakkar
- Department of Endocrinology, Seth G S Medical College & KEM Hospital, Mumbai, India
| | - Swati Ramteke-Jadhav
- Department of Endocrinology, Seth G S Medical College & KEM Hospital, Mumbai, India
| | - Rajeev Kasaliwal
- Department of Endocrinology, Mahatma Gandhi Medical College & Hospital, Jaipur, India
| | - Saba Samad Memon
- Department of Endocrinology, Seth G S Medical College & KEM Hospital, Mumbai, India
| | - Virendra Patil
- Department of Endocrinology, Seth G S Medical College & KEM Hospital, Mumbai, India
- Correspondence should be addressed to V Patil:
| | - Puja Thadani
- Department of Endocrinology, Seth G S Medical College & KEM Hospital, Mumbai, India
| | - Nilesh Lomte
- Department of Endocrinology, Seth G S Medical College & KEM Hospital, Mumbai, India
| | - Shilpa Sankhe
- Department of Radiology, Seth G S Medical College & KEM Hospital, Mumbai, India
| | - Atul Goel
- Department of Neurosurgery, Seth G S Medical College & KEM Hospital, Mumbai, India
| | - Sridhar Epari
- Department of Pathology, Tata Memorial Centre, Mumbai, India
| | - Naina Goel
- Department of Neuropathology, Seth G S Medical College & KEM Hospital, Mumbai, India
| | - Anurag Lila
- Department of Endocrinology, Seth G S Medical College & KEM Hospital, Mumbai, India
| | - Nalini S Shah
- Department of Endocrinology, Seth G S Medical College & KEM Hospital, Mumbai, India
| | - Tushar Bandgar
- Department of Endocrinology, Seth G S Medical College & KEM Hospital, Mumbai, India
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Vengaloor Thomas T, Abraham A, Bhanat E, Al Hmada Y, Albert A, Vijayakumar S, Stinger SP, Packianathan S. Malignant peripheral nerve sheath tumor of nasal cavity and paranasal sinus with 13 years of follow-up-A case report and review of literature. Clin Case Rep 2019; 7:2194-2201. [PMID: 31788278 PMCID: PMC6878039 DOI: 10.1002/ccr3.2465] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 08/09/2019] [Accepted: 09/01/2019] [Indexed: 12/11/2022] Open
Abstract
Although extremely rare, sarcomas including malignant peripheral nerve sheath tumors should be considered in the differential diagnosis of sino-nasal tract lesions. Long-term cure is possible through definitive operative management followed by adjuvant therapy.
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Affiliation(s)
- Toms Vengaloor Thomas
- Department of Radiation OncologyUniversity of Mississippi Medical CenterJacksonMississippi
| | - Anu Abraham
- Department of PathologyUniversity of Mississippi Medical CenterJacksonMississippi
| | - Eldrin Bhanat
- Department of Radiation OncologyUniversity of Mississippi Medical CenterJacksonMississippi
| | - Youssef Al Hmada
- Department of PathologyUniversity of Mississippi Medical CenterJacksonMississippi
| | - Ashley Albert
- Department of Radiation OncologyUniversity of Mississippi Medical CenterJacksonMississippi
| | - Srinivasan Vijayakumar
- Department of Radiation OncologyUniversity of Mississippi Medical CenterJacksonMississippi
| | - Scott P. Stinger
- Department of Otolaryngology and Communicative SciencesUniversity of Mississippi Medical CenterJacksonMississippi
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Lee S, Lee C, Kim JK, Nam W. An unusual presentation of intraosseous malignant peripheral nerve sheath tumour of mandible. Dentomaxillofac Radiol 2019; 48:20180341. [PMID: 31188646 DOI: 10.1259/dmfr.20180341] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Malignant peripheral nerve sheath tumour (MPNST) is a rare mesenchymal tumour which usually presents high grade malignancy. We report an atypical case of intraosseous malignant peripheral nerve sheath tumour on mandible in a 36-year-old male. Patient presented with an incidentally discovered radiolucency on the left anterior mandible and did not complain of any symptoms. Panoramic radiograph and computed tomography showed enlargement of inferior alveolar nerve canal, thinning of the cortex and calcified foci within an expansile mass. Magnetic resonance images revealed heterogeneous hyperintense signal intensity with a well-defined margin on T2 weighted images, heterogeneous enhancement on contrast-enhanced T1 weighted images and intermediate signal intensity and inferior alveolar nerve canal enlargement on T1 weighted images. In spite of benign radiologic characteristics as mentioned above, histopathologic examination of biopsied specimen otherwise revealed a low-grade malignancy. Wide excision of mandible was performed and there has been no loco-regional recurrence or distant metastasis over 1 year following surgery. This case indicates that, even when imaging modalities clearly demonstrate benign nature of intraosseous neurogenic tumour, care must be taken to establish proper treatment plan for assumed malignancy with a definitive histopathological analysis.
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Affiliation(s)
- Sanghoon Lee
- Department of Oral and Maxillofacial Surgery, Yonsei University College of Dentistry, Seoul, Republic of Korea.,Department of Oral and Maxillofacial Surgery, Jukjeon Dental Hospital, College of Dentistry, Dankook University, Gyeonggi-do, Republic of Korea
| | - Chena Lee
- Department of Oral and Maxillofacial Radiology, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Jin-Kyu Kim
- Department of Oral and Maxillofacial Surgery, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Woong Nam
- Department of Oral and Maxillofacial Surgery, Yonsei University College of Dentistry, Seoul, Republic of Korea
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