What is the normal value for AFP tumor marker?

The normal value for the AFP tumor marker is generally less than 25 μg/L. Detailed analysis is as follows:

The AFP tumor marker usually refers to serum alpha-fetoprotein, which is primarily synthesized by fetal hepatic cells and the yolk sac. It normally exists at high concentrations in fetal circulation but is gradually replaced by albumin within about three months after birth. Therefore, serum levels in adults are typically low. Because this substance can be present at elevated levels in certain tumors, it serves as a positive indicator for multiple types of cancer and is most commonly used as a serum marker for primary hepatocellular carcinoma. The normal value is generally considered to be less than 25 μg/L. Elevated serum alpha-fetoprotein levels may indicate the presence of cancer, warranting close clinical attention.

Once a tumor is detected, early consultation with an oncologist for curative treatment is recommended to help control disease progression, improve prognosis, and enhance quality of life.