• Evaluated markers identified by Zhang et al. (53) in an independent study population • Sera from 42 women with OC, 65 with benign tumors, and 76 with digestive diseases • Measured levels of various posttranslationally forms of TTR, apolipoprotein A1, and CA125 using SELDI-TOF-MS • Examined power of markers to discriminate sera from women with ovarian cancer from sera from women with other diseases. This evidence concerns the gene MUC16 and digestive system disorder.