Cancer antigen CA 72-4 (CA 72-4) is a biomarker for ovarian cancer. Elevated level of CA 72-4 has been reported in gastrointestinal (GI) cancer patients. Level of Cancer Antigen 72-4 (CA 72-4) has been also been shown to be increased in multiple cancers e.g pancreas, stomach, gallbladder, biliary tract, colon, breast, ovary, cervix and endometrium. CA 72-4 along with CA 19-9 and CEA assays is used to diagnose and monitor gastrointestinal cancer.; Form/Appearance: Liquid; (50 mM Phosphate, 0.15M NaCl), (pH 7.2-7.6) Preservative 0.15% Sodium Azide and 0.2% Proclin 300, 1 KU