title: Computed tomography of the enlarged cisterna magna.
abstract: The unusual appearance of the large cisterna magna on computed tomography is presented and the radiographic signs are reviewed and correlated. This entity may be confused with a variety of other lesions. Awareness of such developmental anomalies may obviate the need for angiography and pneumoencephalography in selected cases.
mesh_terms: D000293:Adolescent; D000328:Adult; D000792:Angiography; D001932:Brain Neoplasms / Q000000981:diagnostic imaging; D002493:Central Nervous System Diseases / Q000000981:diagnostic imaging; D002946:Cisterna Magna / Q000002:abnormalities / Q000098:blood supply / Q000000981:diagnostic imaging*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011011:Pneumoencephalography; D014057:Tomography, X-Ray Computed; D014711:Vertebral Artery / Q000000981:diagnostic imaging