title: [Completely thrombosed large aneurysm of the distal middle cerebral artery: a case report].
abstract: A 19 year old male was admitted for evaluation after a seizure. Physical and neurological examination was normal. CT demonstrated an enlarged, high density mass in the right parietal lobe. MRI showed a homogeneous high intensity T1 weighted mass, surrounded by a low intensity T2 weighted rim in the right parietal lobe. Angiography did not show any abnormal findings. A diagnosis of cavernous angioma with primary bleeding in the subcortical region of the right parietal lobe was made after radiological examination. Histological examination showed a completely thrombosed aneurysm. The mechanism of the complete thrombosis and the growth of this large aneurysm and the shortcomings of radiological examination are discussed.
authors.affiliation: Department of Neurosurgery, Kitasato University School of Medicine.
authors.forename: H
authors.initials: H
authors.lastname: Oka
authors.forename: A
authors.initials: A
authors.lastname: Kurata
authors.forename: Y
authors.initials: Y
authors.lastname: Miyasaka
authors.forename: I
authors.initials: I
authors.lastname: Kobayashi
authors.forename: T
authors.initials: T
authors.lastname: Oomomo
authors.forename: K
authors.initials: K
authors.lastname: Yada
authors.forename: S
authors.initials: S
authors.lastname: Morii
authors.forename: S
authors.initials: S
authors.lastname: Kan
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D006801:Humans; D002532:Intracranial Aneurysm / Q000175:diagnosis* / Q000601:surgery; D002542:Intracranial Embolism and Thrombosis / Q000175:diagnosis* / Q000601:surgery; D008279:Magnetic Resonance Imaging; D008297:Male; D014057:Tomography, X-Ray Computed