Aspergillotic aneurysm formation of cerebral artery following neurosurgical operation.

A rare case of intracranial aspergillotic aneurysm following neurosurgical operation for facial spasm is presented. Severe meningitis had persisted several days prior to the subarachnoid hemorrhage which occurred on 70th postoperative day. Angiography demonstrated a fusiform aneurysm at the peduncular segment of the superior cerebellar artery on the other side of operation. As the repeated cultures of CSF were negative, the pathogenetic factor causing aneurysm formation could not be identified before second operation of aneurysmal resection. Pathological study of the specimen revealed the arterial wall being deeply invaded by aspergillotic hyphae.