CK7 immunostaining in colonic, gastric, and pancreatic tumors. (A) Gastric and (B) pancreatic carcinomas showed diffuse and strong positive CK7 immunostaining. (C) Colonic adenocarcinoma displayed focal cytoplasmic immunoreactivity for CK7. (A)-(B), original magnification × 100; (C), original magnification × 200.
Bayrak et al. Diagnostic Pathology 2012 7:9 doi:10.1186/1746-1596-7-9