In our study, we analyzed serum VEGF-C levels in a large number of ovarian cancer samples using ELISA method and focusing on different subtypes, serous-papillary adenocarcinoma, mucinous adenocarcinoma, endometroid tumor, clear cell ovarian tumor and others, which differ substantially in a number of genetic, biological, pathological and clinical features. The gene discussed is VEGFC; the disease is ovarian clear cell tumor.