Acute subdural hematoma caused by a ruptured giant intracavernous aneurysm: case report.

A case of a giant intracavernous carotid artery aneurysm that presented as an acute subdural hematoma is reported. The patient was initially treated unsuccessfully with endovascular aneurysmal embolization and subsequently underwent attempted microsurgical clipping with preservation of the parent artery. At operation, an angiogram showed occlusion of the parent vessel, and the aneurysm was trapped by occlusion of the internal carotid artery. The patient did well for 2 days postoperatively but then developed contralateral progressive hemiplegia and aphasia. Emergent subsequent exploration and middle cerebral artery embolectomy were performed, and the hemiplegia and aphasia resolved rapidly. At 2-year follow-up, the patient continues to do well. To our knowledge, this is the first reported case of a patient who survived an acute subdural hematoma caused by an intracavernous carotid artery aneurysm.