Squamous Cell Carcinoma Antigen(SCCA) CLIA kit (Chemiluminescence Immunoassay) is an in vitro diagnostic quantitative test kit. SCC antigen (SCCA) represents a subfraction of tumor-associated antigens related to squamous cell carcinoma and is used as a serum tumor marker for squamous cell carcinoma of the head and neck, lung (including esophagus), and other types of SCC. SCCA is aiding in the evaluation and monitoring of squamous cell carcinoma of the head and neck, lung, and cervix.