[A case of moyamoya disease with repeated intraventricular hemorrhage due to a ruptured pseudoaneurysm].

A case of Moyamoya disease with ruptured aneurysm is reported. This is a rare case in that episodes of intraventricular bleedings were repeated. The size of the aneurysm was markedly increased after the second bleeding, and the ruptured aneurysm was histologically certified after operative resection to be a pseudo-aneurysm.