KRT7 and endometrioid tumor: In a study by Loy et al. out of the 165 ovarian tumors, 86% of the endometrioid ovarian tumors and none of the colorectal carcinomas were CK7+/CK20−, whereas 96% of the colorectal carcinomas and none of the endometrioid tumors were CK7−/CK20+ pattern [44].