The serum tumour markers that were assessed during this audit were carcinoembryonic antigen, alpha foetal protein (AFP), prostate-specific antigen (PSA), carbohydrate antigen 19-9 (CA 19-9), cancer antigen 15-3 (CA 15-3), cancer antigen 125 (CA 125), and human chorionic gonadotropin (HCG). The gene discussed is MUC16; the disease is neoplasm.