CK18 was expressed in typical epithelial cells of most organs but absent in standard squamous epithelium. at the least an occasional weak CK18 positivity was witnessed in 90 of one hundred fifteen (78.3%) tumor forms. https://emiliegkwp838417.wikienlightenment.com/7180165/the_smart_trick_of_ck8_that_no_one_is_discussing