AFP (alpha-fetoprotein) is a glycoprotein found in fetal liver and amniotic fluid with very low levels in adults. With the development of medical technology, it was later found that this glycoprotein is significantly elevated in most cases of liver cancer patients, therefore, this glycoprotein is used as a specific tumor marker, however, not all patients with elevated AFP are hepatocellular carcinoma, in general, elevated AFP can occur in the following Primary liver cancer (70-80% of patients with liver cancer have elevated AFP, while 20-30% of patients with liver cancer do not have high AFP). 2.Active hepatitis. 3.Genitourinary tumor. 4.Women during pregnancy.