CK18 was expressed in ordinary epithelial cells of most organs but absent in usual squamous epithelium. at the least an occasional weak CK18 positivity was noticed in 90 of 115 (78.3%) tumor types. large-unfold CK18 positivity was witnessed in 37 (31.nine%) of tumor entities, including adenocarcinomas of your lung, prostate, colon and pancreas toge