CXCL12 and dysgerminoma: The cellular expression of CXCL12 was examined by IHC on sections isolated from five healthy ovaries, eight serous or mucinous benign tumors (some still containing normal ovarian tissue), eight serous or mucinous borderline epithelial tumors, three non epithelial ovarian tumors (i.e. 2 granulosa tumors and 1 dysgerminoma), and 183 invasive EOC.