Glycoside antigen determination refers to tumor glycoside-related antigen, and there are common carcinoma antigen 50, carcinoma antigen 199, carcinoma antigen 125 and so on, which are used for the diagnosis of related tumors and so on. 1. Cancer antigen 50 (CA50): tumor glycan-related antigen composed of salivary acid glycolipids and salivary acid glycoproteins, it has no specificity for the diagnosis of tumors, and its elevation is mostly seen in pancreatic cancer, ovarian cancer, primary liver cancer, etc. Its reference value is <20,000U/kg. Its reference value is <2.0 million U/L. 2. Cancer antigen 199 (CA199): its elevation is seen in pancreatic cancer, hepatobiliary and gastrointestinal diseases. Continuous monitoring is often performed to assess disease progression, surgical efficacy and prognosis. The reference value is <37,000 U/L. 3. Carcinoma antigen 125 (CA125): it is of great clinical value in the diagnosis of ovarian cancer, and can also be used in the evaluation of the efficacy of ovarian cancer and the judgment of recurrence, etc. The reference value is <35,000 U/L. The reference value is <35,000 U/L. If there is any discomfort or abnormality in the index, it is recommended to consult a doctor in time for diagnosis and treatment.