EPCAM and carcinoma: CD326 (epithelial cell adhesion molecule; EpCAM) was originally the epithelial cell marker, and it has been reported to be expressed by approx. 87–100 % of the main ascites-causing carcinomas (Passebosc-Faure et al. 2005; De Angelis et al. 1992; Diaz-Arias et al. 1993; Went et al. 2004).