What are the 12 tumor items?

Tumor 12 items, including carbohydrate antigen, carcinoembryonic antigen, alpha-fetoprotein, ferritin, etc., among which carbohydrate antigen classification is more. Tumor indicators are often used in clinical evaluation of the efficacy of tumor treatment. In recent years, this tumor marker has been used in screening programs, but the accuracy of screening is often not high, because most malignant tumors do not show an increase in tumor markers in the early stage, and even some patients in the advanced stage may show these markers within the normal range.