Fig. 2From: Extended resection including adjacent organs and Ki-67 labeling index are prognostic factors in patients with retroperitoneal soft tissue sarcomasKaplan-Meier curves of overall survival (OS) after surgical resection. a OS in all cases. All the events were due to tumor progression. b OS according to the type of surgery. The extended surgery improved OS in RPS. c OS according to the Ki-67 labeling index. P values were calculated using the log-rank testBack to article page