KRT7 and colorectal adenocarcinoma: In addition, Wang et al (19) reported that 38% (11/29) of gastric adenocarcinomas and 10% (4/40) of colorectal adenocarcinomas were CK7+/CK20+; thus, CK7+/CK20+ staining pattern is more common in gastric adenocarcinomas than in colorectal cancer.