title: Trigeminal neurinoma presenting with intratumoral hemorrhage: report of two cases.
abstract: We report 2 cases of trigeminal neurinoma presenting with spontaneous intratumoral hemorrhage. There are only 2 similar cases reported in the literature. Presenting symptoms were headache, diplopia, disturbed consciousness and trigeminal disturbance with sudden onset. CT scan showed a typical fluid-fluid level within low-density mass in the cerebellopontine angle in one case. On MRI, one case showed a typical fluid-fluid level on T2-weighted image and another one had mixed signal intensities including hyper- and hypointensities on both T1- and T2-weighted images. Histologically, increased vascularity, consisting of dilated and thin-walled vessels presenting telangiectatic or cavernous angiomatous appearances were observed in the specimens in both cases. The size of these tumors was about 3 cm each in diameter. Risk factors for hemorrhage appear to be large tumor size and increased vascularity.
authors.affiliation: Department of Neurological Surgery, Okayama University Medical School, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Asari
authors.forename: S
authors.initials: S
authors.lastname: Tsuchida
authors.forename: A
authors.initials: A
authors.lastname: Fujiwara
authors.forename: N
authors.initials: N
authors.lastname: Yabuno
authors.forename: T
authors.initials: T
authors.lastname: Furuta
authors.forename: T
authors.initials: T
authors.lastname: Ohmoto
mesh_terms: D000368:Aged; D002530:Cerebellopontine Angle; D002543:Cerebral Hemorrhage / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D003390:Cranial Nerve Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D003399:Craniotomy; D006392:Hemangioma, Cavernous / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D009364:Neoplasm Recurrence, Local / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D016609:Neoplasms, Second Primary / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D009442:Neurilemmoma / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D014057:Tomography, X-Ray Computed; D014276:Trigeminal Nerve / Q000473:pathology* / Q000601:surgery