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Ruptured aneurysms of anterior cerebral or anterior communicating arteries

CT patterns

From the Department of Neurology and Psychiatry of the Tulane Medical School of New Orleans, the Tulane Neurology Service of the Charity Hospital, and the Veterans Administration Hospital of New Orleans, New Orleans, LA.

We reviewed the CT findings in 40 patients with ruptured aneurysms of the anterior cerebral or anterior communicating arteries. Within 3 days of the ictus, the common patterns included blood in the pericallosal cistern and interhemispheric fissure, blood in the caval-septa1 region, unilateral or bilateral frontal hematoma, and diffuse symmetric intraventricular and basal cisternal blood. In 6 of 23 patients with postcontrast studies, an abnormal enhancing region delineated the aneurysmal sac.

Address correspondence and reprint requests to Dr. Weisberg. Department of Neurology and Psychiatry, 1430 Tulane Avenue, New Orleans, LA 70112.

Accepted for publication March 7, 1985.

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