[A ruptured aneurysm associated with pituitary tumor (author's transl)].

The aneurysm case associated with brain tumor is not so rare. Most of aneurysms are non-ruptured and found incidentally during the examination for brain tumor. We have experienced with 4 aneurysm cases associated with brain tumor among 1,280 aneurysm cases during these 17 years. One out of 4 cases was of ruptured aneurysm associated with pituitary tumor. This rare case and review of the literature were described.