MKI67 and carcinoma: A significant positive correlation between expression of YAP 1 and Ki67 was evaluated in our UCB cohort, in which the frequency of cases with high expression of Ki67 was significantly larger in carcinomas with a positive expression of YAP 1 (74/113 cases, 65.9%) than in those cases with a negative expression of YAP 1 (46/100 cases, 46.0%; χ2 test, P = 0.004, Table 4).