This kit is applicable to in vitro quantitative detection of carcino-embryonic antigen (CEA) in human serum/plasma/whole blood sample, which’s mainly used for observation of efficacy against malignancies as well as prediction, prognosis, and recurrence monitoring. This kit only provides carcino-embryonic antigen test results, and results obtained shall be used in combination with other clinical information for analysis. It must only be used by healthcare professionals.