title: Tentorial cavernous angioma with profuse bleeding. Case report.
abstract: This 15-year-old boy with a tentorial cavernous angioma reported occasional headache and scintillation in his left visual field. Magnetic resonance imaging revealed a well-demarcated, homogeneously enhanced tumor originating from the right cerebellar tentorium and extending into both the supratentorial and infratentorial spaces. Although a meningioma was suspected, vertebral artery angiography revealed a thickened meningeal branch originating from the right posterior inferior cerebellar artery and flecked tumor stain with pooling of contrast medium until the late venous phase. A cavernous angioma of the tentorium was suspected based on this finding, and as expected from the radiological findings, profuse bleeding was encountered during tumor removal. The histological diagnosis was a cavernous angioma. A cavernous angioma of the tentorium is extremely rare but should be differentiated from a meningioma preoperatively given that a cavernous angioma of dural origin tends to bleed massively during removal.
authors.affiliation: Department of Neurosurgery, Tsubame Rosai Hospital, Japan. himorisan@ceres.ocn.ne.jp
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Mori
authors.forename: Toshiro
authors.initials: T
authors.lastname: Koike
authors.forename: Shin
authors.initials: S
authors.lastname: Endo
authors.forename: Yoshitaka
authors.initials: Y
authors.lastname: Takii
authors.forename: Takeo
authors.initials: T
authors.lastname: Uzuka
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Takahashi
authors.forename: Jusuke
authors.initials: J
authors.lastname: Ito
authors.forename: Ryuichi
authors.initials: R
authors.lastname: Tanaka
mesh_terms: D000293:Adolescent; D002528:Cerebellar Neoplasms / Q000175:diagnosis / Q000473:pathology / Q000601:surgery*; D002533:Cerebral Angiography; D003399:Craniotomy / Q000379:methods; D003937:Diagnosis, Differential; D020786:Hemangioma, Cavernous, Central Nervous System / Q000175:diagnosis / Q000473:pathology / Q000601:surgery*; D006801:Humans; D015192:Infratentorial Neoplasms / Q000175:diagnosis / Q000473:pathology / Q000601:surgery*; D020300:Intracranial Hemorrhages / Q000175:diagnosis / Q000473:pathology / Q000601:surgery*; D008279:Magnetic Resonance Imaging; D008297:Male; D015173:Supratentorial Neoplasms / Q000175:diagnosis / Q000473:pathology / Q000601:surgery*; D014057:Tomography, X-Ray Computed