MUC16 and ovarian carcinoma: We have shown that in the serum of healthy persons, CA-125 concentration was below 30–35 ng/ml (8.4±1.3 ng/ml), whereas in the ovarian cancer group serum, CA-125 level increased significantly (276.9±45.7 ng/ml, p<0.001) as was observed earlier by other authors (1,15).