Elevated AFP is a more specific indicator for diagnosing primary liver cancer in clinical practice, but it does not necessarily mean that the patient has liver cancer if AFP is high. It is more clinically significant to observe the dynamic changes of AFP in the short term, for example, if AFP > 500ng/L for 4 consecutive weeks or if AFP has low concentration and proceeds to increase, the clinician should be alert and must perform imaging examinations related to liver cancer, such as ultrasound, CT or MRI. elevated AFP is also seen in the following cases: 1. women during pregnancy; 2. patients with liver failure, if patients with liver failure AFP is relatively high, suggesting a strong regenerative capacity of hepatocytes, which helps the prognosis. If AFP is not high, it indicates poor hepatocyte regeneration and a poor prognosis for the patient.