RUPTURED VERTEBROBASILAR JUNCTION ANEURYSM ASSOCIATED WITH BASILAR ARTERY FENESTRATION

A case of a ruptured saccular aneurysm arising from the proximal porti on of a partially duplicated basilar artery in a 36-year-old woman is reported. CT and lumbar puncture confirmed subarachnoid haemorrhage. C erebral angiography detected a vertebrobasilar junction aneurysm assoc iated with basilar artery fenestration. The patient underwent successf ul clipping and coating of the aneurysm by a right lateral suboccipita l osteoclastic approach. Embryological development, pathogenesis, diag nostic and therapeutic difficulties of this vascular malformation are discussed in this report.