Can liver function tests detect liver cancer?

Generally, liver function tests cannot directly detect liver cancer, but can only serve as an auxiliary diagnostic method. Detailed analysis is as follows:

Liver function tests usually cannot directly detect liver cancer, as they primarily reflect the liver's synthetic, metabolic, and detoxification functions, rather than directly identifying tumor cells or space-occupying lesions. In the early stages of liver cancer, the liver's compensatory capacity may still be strong, and liver function indicators may remain within the normal range. Even in the middle and late stages, some patients may only exhibit mild abnormalities, which are not unique to liver cancer. Liver inflammation, cirrhosis, and other conditions may also cause similar changes; therefore, liver cancer cannot be diagnosed based solely on liver function tests.

However, liver function tests can serve as an auxiliary method for diagnosing liver cancer. For example, liver cancer patients may exhibit decreased serum albumin levels, elevated bilirubin, prolonged prothrombin time, and other abnormal liver function indicators. These parameters can reflect the degree of liver damage, assist doctors in assessing the severity of the condition and the liver's functional reserve, and provide reference information for developing treatment plans. Additionally, combining tumor marker tests such as alpha-fetoprotein (AFP), and imaging examinations like liver ultrasound and CT scans, can lead to a more accurate diagnosis of liver cancer.