MUC16 and metastatic malignant neoplasm: When tumours were classified into benign, BOTs, stage I OC, stage II-IV OC, and secondary metastatic cancer, the model showed poor to excellent discrimination between the different subtypes, with AUCs varying between 0.54 and 0.99 when the CA125 level was included in the model and between 0.50 and 0.99 without the CA125 level (Table 4).