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American Journal of Roentgenology, Vol 95, 831-836, Copyright © 1965 by American Roentgen Ray Society

COLLATERAL CIRCULATION IN THE POSTERIOR FOSSA VIA LEPTOMENINGEAL ANASTOMOSES

W. WEIDNER M.D.1, P. CRANDALL M.D.2, W. HANAFEE M.D.1, and U. TOMIYASU M.D.3

1 Associate Professor, Department of Radiology, UCLA Center for the Health Sciences, Los Angeles, California
2 Associate Professor, Department of Neurosurgery, UCLA Center for the Health Sciences, Los Angeles, California
3 Staff Pathologist, V.A. Hospital Center, Los Angeles, and Assistant Clinical Professor, Department of Pathology, UCLA Center for the Health Sciences, Los Angeles, California

Collateral circulation in the posterior fossa via leptomeningeal vessels has been described and demonstrated angiographically in a case of basilar artery thrombosis. The patient survived the initial insult and lived for 3 months; during the time repeat angiography did not reveal recanalization of the basilar artery or an increase in the size of collateral vessels. Correlation of collateral flow patterns with expected sparing of certain areas of the brain stem was confirmed at autopsy.


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Copyright © 1965 by the American Roentgen Ray Society.