[Aneurysm arising from the cortical branch of the superior cerebellar artery: case report].

We reported a case of a 64-year-old man who presented a subarachnoid hemorrhage due to rupture of an aneurysm arising from the cortical branch of the superior cerebellar artery (SCA) at the junction of the superior vermian branch and the hemispheric branch. Eight days after the rupture, neck clipping of the aneurysm was performed successfully using the occipital transtentorial approach in a prone position, and the patient's postoperative course was uneventful. This rare case of aneurysm arising from the cortical branch of SCA was discussed with a review of literature.