Clinical experiences of ruptured posteroinferior cerebellar artery aneurysms and anatomical analysis in the cadaver in a single center of China.

Objective: Posteroinferior cerebellar artery (PICA) aneurysms are uncommon and have not been well investigated previously. We report our series of 29 ruptured PICA aneurysms with surgical treatment along with the description of the surgical anatomy of the PICA to the lower cranial nerves in cadaveric specimen.

Methods: All patients with ruptured PICA aneurysms who were surgically treated at the First Affiliated Hospital of Soochow University during the period from January 1995 to December 2008 were reviewed retrospectively.