Among CXCL12-positive EOC specimens, we observed no significant differences in the fraction of CXCL12high-producing tumors for the four histotypes examined (i.e. serous, clear-cell, endometrioid and mucinous), despite previous reports of differences in epidemiologic and genetic changes, tumor markers and response to treatment (reviewed in [11]). Here, CXCL12 is linked to neoplasm.