抄録
An aneurysm in the 4th ventricle is rare. We encountered a ruptured case, which presented with an intraventricular hemorrhage. The aneurysm neck was located at the choroidal point of the posterior inferior cerebellar artery (PICA), and the dome protruded into the 4th ventricle. This aneurysm was explored via the cerebellomedullary fissure and the telovelotonsillar cleft, and the aneurysm neck was clipped through this fissure without splitting the vermis. Lesions in the brainstem and the 4th ventricle can be approached through the appropriate natural pathway (the cerebellomedullary fissure) without damaging normal tissue. We discuss the surgical approach into the 4th ventricle, including the patient's position.
© 2001 一般社団法人 日本脳卒中の外科学会