Cancer is a generic term for a large group of malignant tumors. Generally, cancer has some tumor markers that can be used as reference, which is often referred to as cancer cell index. If this indicator is greater than 200μg/L for two consecutive months or greater than 400μg/L for one consecutive month, it indicates possible liver cancer, and further liver enhancement CT and liver aspiration pathology are needed to confirm the diagnosis. Other indices like glycoantigen CA19-9, this index is also below 0-40kU/L, if it is greater than 200kU/L or 300kU/L or even higher, it suggests the possibility of pancreatic cancer. Of course, the cancer cell index is only a reference and cannot be used to diagnose cancer alone. A high index does not necessarily mean that there is a problem, and a normal index does not necessarily exclude the possibility of cancer. It is recommended to have regular medical checkups for early detection and treatment to prevent diseases.