Fatal Rupture of Dissecting Anterior Inferior Cerebellar Artery Aneurysm as an Unexpected Complication After Anterior Skull Base Surgery: A Case Report

Abstract

Aneurysm of the anterior inferior cerebellar artery (AICA) is a very rare entity, and the manifestation and manipulation of suchaneurysms remain contentious. In this paper, we report a case where a successful surgery for an olfactory groove meningiomawas performed and the patient discharged, but re-admitted to hospital with loss of consciousness and subsequently passed awaythree hours after re-admission. The patient was diagnosed with subarachnoid hemorrhage. The cause of the fatal subarachnoidhemorrhage was rupture of a new onset AICA dissecting aneurysm which had provided neither clinical nor radiological signs beforethe operation. We discuss the possible causes of the formation of such aneurysm.