Vertebrobasilar dolichoectasia associated with Marfan syndrome.

We report a 37-year-old woman with Marfan syndrome (MFS) who presented with acute myelopathy secondary to a subdural spinal hematoma. The patient died of a subarachnoid hemorrhage 4 days later. Autopsy showed a markedly ectatic vertebrobasilar system with fragmentation of the internal elastic lamina. Microscopic examination of the aorta similarly showed a fragmented internal elastic lamina. We discuss the implications of our patient's early onset vertebrobasilar dolichoectasia; this intracranial disease represents a rare cause of subarachnoid hemorrhage in MFS.