title: Rare isolated trigeminal nerve sarcoidosis mimicking schwannoma.
abstract: Sarcoidosis is a granulomatous disorder of unknown etiology involving multiple organ systems. Isolated neurosarcoidosis is exceedingly rare. This case report presents isolated trigeminal nerve sarcoidosis mimicking schwannoma in a patient presenting with symptoms of trigeminal neuralgia. Neuroimaging revealed a mass associated with trigeminal nerve which prospectively thought to represent schwannoma. However, surgical pathology was consistent with sarcoidosis. Given great overlap in imaging characteristic of tumors in the Meckel's cave intraoperative frozen section biopsy may be considered to rule out an inflammatory lesion.
authors.affiliation: Department of Radiology, Stony Brook University Medical Center, Stony Brook, NY, USA. Electronic address: Lev.Bangiyev@stonybrookmedicine.edu.
authors.forename: Lev
authors.initials: L
authors.lastname: Bangiyev
authors.affiliation: Department of Pathology, NYU Langone Medical Center, New York, NY, USA.
authors.forename: Susan
authors.initials: S
authors.lastname: Kornacki
authors.affiliation: Department of Pathology, NYU Langone Medical Center, New York, NY, USA.
authors.forename: Irina
authors.initials: I
authors.lastname: Mikolaenko
mesh_terms: D001706:Biopsy; D002493:Central Nervous System Diseases / Q000150:complications / Q000473:pathology*; D003390:Cranial Nerve Neoplasms / Q000473:pathology*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D009442:Neurilemmoma / Q000473:pathology*; D012507:Sarcoidosis / Q000150:complications / Q000473:pathology*; D014276:Trigeminal Nerve / Q000473:pathology*; D020433:Trigeminal Nerve Diseases / Q000150:complications / Q000473:pathology*; D014277:Trigeminal Neuralgia / Q000209:etiology / Q000473:pathology*
keywords: Neuroimaging; Neurosarcoidosis; Pathology; Schwannoma; Trigeminal neuralgia