A 16-year-old girl with systemic lupus erythematosus and diabetes mellitus who was receiving prednisone, azathioprine, and insulin developed headaches, fever, irritability, and seizures. Studies revealed a large proximal basilar artery aneurysm with subarachnoid hemorrhage. Despite intubation and a ventriculopleural shunt, she became decerebrate and died. Postmortem studies revealed that this patient had an intracranial mycotic aneurysm due to Candida albicans.