title: Concurrent spinal schwannoma and meningioma mimicking a single cervical dumbbell-shaped tumor: case report.
abstract: Dumbbell-shaped tumors consisting of 2 different tumors are extremely rare. Herein, the authors present a case of concurrent spinal schwannoma and meningioma mimicking a single cervical dumbbell-shaped tumor. A 64-year-old man presented with a 5-year history of gradually exacerbating left occipital pain without clinical evidence of neurofibromatosis. Magnetic resonance imaging showed an extradural tumor along the left C-2 nerve root with a small intradural component. The tumor was approached via a C-1 hemilaminectomy. The intradural tumor was resected together with the extradural tumor after opening the dura mater. The intradural tumor was attached to the dura mater around the exit point of the C-2 nerve root. Intraoperative biopsy revealed that the extradural tumor was a schwannoma and that the intradural tumor was a meningioma. The dura mater adjacent to the tumor was then coagulated and resected. Postoperative pathological examination confirmed the same diagnoses with no evidence of continuity between the intra- and extradural components. The patient's postoperative clinical course was uneventful. Clinicians should be aware that cervical dumbbell-shaped tumors can consist of 2 different tumors.
authors: Departments of 1 Orthopedic Surgery.
authors: Takeshi
authors: T
authors: Oichi
authors: Departments of 1 Orthopedic Surgery.
authors: Hirotaka
authors: H
authors: Chikuda
authors: Pathology, and.
authors: Teppei
authors: T
authors: Morikawa
authors: Radiology, The University of Tokyo Hospital, Tokyo, Japan.
authors: Harushi
authors: H
authors: Mori
authors: Departments of 1 Orthopedic Surgery.
authors: Daisuke
authors: D
authors: Kitamura
authors: Departments of 1 Orthopedic Surgery.
authors: Junya
authors: J
authors: Higuchi
authors: Departments of 1 Orthopedic Surgery.
authors: Yuki
authors: Y
authors: Taniguchi
authors: Departments of 1 Orthopedic Surgery.
authors: Yoshitaka
authors: Y
authors: Matsubayashi
authors: Departments of 1 Orthopedic Surgery.
authors: Yasushi
authors: Y
authors: Oshima
authors: Departments of 1 Orthopedic Surgery.
authors: Sakae
authors: S
authors: Tanaka
mesh_terms: D002574:Cervical Vertebrae; D006801:Humans; D008297:Male; D008577:Meningeal Neoplasms / Q000175:diagnosis* / Q000628:therapy; D008579:Meningioma / Q000175:diagnosis* / Q000628:therapy; D008875:Middle Aged; D009378:Neoplasms, Multiple Primary / Q000175:diagnosis* / Q000628:therapy; D009442:Neurilemmoma / Q000175:diagnosis* / Q000628:therapy; D013125:Spinal Neoplasms / Q000175:diagnosis* / Q000628:therapy
keywords: cervical spine; meningioma; oncology; pathology; schwannoma