title: Ectasia of the intracranial arteries diagnosed by computed tomography. Megadolichobasilar artery: CT diagnosis.
abstract: The megadolichobasilar anomaly may be diagnosed by CT as an extra-axial lesion in the cerebellopontine angle. It enhances in a tubular fashion after intravenous injection of contrast. Hydrocephalus resulting from obstruction of CSF circulation may be demonstrated.
mesh_terms: D001488:Basilar Artery / Q000002:abnormalities* / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed; D014711:Vertebral Artery / Q000002:abnormalities / Q000000981:diagnostic imaging