Cirrhosis of the liver, cholecystitis, gallbladder stones, rectal polyps, etc., may cause carcinoembryonic antigen to be elevated by 50 ng/mL. The normal value of carcinoembryonic antigen is less than 5 micrograms per liter of blood, but the elevation of carcinoembryonic antigen 50ng/mL is not necessarily only for malignant tumors, but also for some benign tumors, including cirrhosis of the liver, cholecystitis, gallbladder stones, rectal polyps and so on. Moreover, some irregular dietary and living habits may also lead to high carcinoembryonic antigen. Carcinoembryonic antigen 50ng/mL, which is far from the normal range, should be highly alert to malignant tumors, such as gallbladder cancer, liver cancer, rectal cancer, in addition to benign tumors. If carcinoembryonic antigen is high, it is recommended to consult a doctor in time and complete relevant examinations to analyze the cause of the disease, and then target treatment.