NECTIN4 and ovarian serous adenocarcinoma: Several high grade serous ovarian cancer cell lines with putative different spread and origin characteristics and appropriate Nectin 4 expressions (high in miliary of tubal origin, Caov-3, OVCAR-3, and OVKATE, and low in non-miliary of ovarian origin, OV-90, ES-2, and TYK-nu, with mean 36-fold higher Nectin 4 expression in the former) were identified, which could be used in further functional in vitro and in vivo (mouse) experiments.