Recurrent subarachnoid hemorrhage due to endometriosis.

A woman with a long history of menstruation-related headaches, at times associated with papilledema and brief episodes of unresponsiveness, was experiencing recurrent cryptogenic subarachnoid hemorrhage. Although the source of hemorrhage was never identified with certainty, strong circumstantial evidence suggested the presence of ectopic endometrial tissue in the spinal canal. Suppression of estrogen levels has prevented further episodes of hemorrhage.