The normal reference value of carcinoembryonic antigen is less than 5ug/L in most hospitals, and if the carcinoembryonic antigen test result is 50ug/L, which is 10 times higher than the upper limit of normal value, it is indeed very high. However, this does not mean that you have a malignant tumor, because carcinoembryonic antigen is a broad-spectrum tumor marker, and many malignant tumors, including pancreatic cancer, stomach cancer, esophageal cancer and other tumors such as breast cancer and lung cancer, may have increased levels of carcinoembryonic antigen. However, certain benign diseases, such as rectal polyps, colitis, liver cirrhosis, etc., may also have increased levels of carcinoembryonic antigen to varying degrees. Therefore, if a hospital tests for carcinoembryonic antigen 50ug/L does not mean that a tumor is present, it must be combined with other test results such as CT and MRI to make the appropriate diagnosis.