[Anterior inferior cerebellar artery aneurysm: report of 2 cases].

Anterior inferior cerebellar artery aneurysm (AICAA) is not common. We have encountered only two cases of AICAA in our 205 cases of intracranial aneurysm. AICAAs were mostly located on the branches or loops of anterior inferior cerebellar artery at the pontine-cerebellar angle, and all of them were saccular. These neurological findings were mainly concerned with the syndrome of the pontine-cerebellar angle. It was found mainly due to subarachnoid hemorrhage. Angiography may establish the diagnosis. Surgical treatment is the first choice. The aneurysm was approached by suboccipital craniectomy and clipped. Postoperatively there were a great proportion of neurological deficits of auditory or/and facial nerves.