Other serum markers, which include mesothelin [14, 18], matrix metalloproteinase 7 (MMP7) [11, 16, 19], cytokeratin 19 fragment (CYFRA 21-1) [16, 20], and glycodelin [11, 21], have shown encouraging performance in ovarian cancer, but mainly in clinical series. Here, MSLN is linked to ovarian cancer.