Fig. 1From: Clinicopathological features and prognostic validity of WHO grading classification of SI-NENsKaplan-Meier analysis of Chinese patients with SI-NENs according to Ki-67 index classification. a With Ki-67 index of 2% as threshold, survival rate of G1 and G2 was not significantly different. b With Ki-67 index of 5% and 20% as threshold between grade 1/2 and grade 2/3 respectively, survival rate among different grades were significantly differentBack to article page