The causes of liver tumor of 11 centimeters but normal alpha-fetoprotein include benign tumor, hepatocellular carcinoma with normal alpha-fetoprotein, intrahepatic cholangiocellular carcinoma, secondary hepatocellular carcinoma and so on. 1. Benign tumors: benign lesions such as hepatic hemangioma and hepatic cysts usually do not cause elevated alpha-fetoprotein even if the tumor reaches 11 centimeters. 2. Liver cancer with normal alpha-fetoprotein: alpha-fetoprotein is only an indicator for screening liver cancer, even if the tumor reaches 11 centimeters, the alpha-fetoprotein may not be elevated. Even if the tumor is 11 centimeters, it may not have elevated alpha-fetoprotein. Some liver cancers may have normal alpha-fetoprotein, and if liver cancer is suspected, further pathological biopsy is needed to confirm the diagnosis. 3. Intrahepatic cholangiocellular carcinoma: different from primary liver cancer, intrahepatic cholangiocellular carcinoma with tumor of 11 centimeters usually does not cause elevated alpha-fetoprotein. 4. Secondary hepatocellular carcinoma: tumors in other parts of the body metastasize to the liver through blood or lymph, and 11cm metastatic tumors appear, and the alpha-fetoprotein may also be normal. If your liver tumor is 11 centimeters but your alpha-fetoprotein is normal, it may be due to other reasons, so please go to the hospital in time, complete the relevant examinations under the doctor’s guidance, clarify the nature of the lesion, and then treat and deal with it in a targeted manner.