Cancer Antigen 72-4(CA72-4) CLIA kit (Chemiluminescence Immunoassay) is an in vitro diagnostic quantitative test kit. CA72-4 is a tumor marker that has been found elevated in a variety of human adenocarcinomas. CA72-4 may have a potential role as an adjunct to conventional biomarkers in disease monitoring of pancreatic, ovarian and colorectal carcinomas.