Fig. 3

Ranking order of Cytokeratin 18 (CK18) immunostaining in cancers. Both the frequency of positive cases (blue dots) and the frequency of strongly positive cases (orange dots) are shown. The conspicuously low rate of strongly positive Whartin tumors is due to the fact, that only basal cells react with CK18 resulting in a low overall percentage of positive cells. 25 additional tumor entities without any CK18 positive cases are not shown due to space restrictions