LYST and hemorrhage: Our study showed that approximately 34.68% (43/124 operated hemisphere) of the operative patients presented with Matsushima type VI (hemorrhage) symptoms, although among operative patients with postoperative CHS, approximately 88.89% (24/27 operated hemisphere) presented with Matsushima types I–V (ischemic) symptoms and 11.11% (3/27) presented with Matsushima type VI (hemorrhage) symptoms.