Prostatitis has the potential to cause elevated carcinoembryonic antigen (CEA). Carcinoembryonic antigen (CEA) was initially found in colon cancer and fetal intestinal tissues, and is now mainly used as a tumor test for clinical monitoring of colorectal, gastric, pancreatic, hepatocellular, lung, breast, and medullary thyroid cancers. It is also seen in choriocarcinoma, bone cancer, prostate cancer and ovarian cancer, but generally has no early diagnostic value. In addition to tumors, certain benign gastrointestinal diseases such as intestinal obstruction, biliary obstruction, pancreatitis, cirrhosis, colon polyps, ulcerative colitis, as well as smokers and the elderly, can also have elevated carcinoembryonic antigen (CAE), which may also be elevated when the patient has prostatitis. People with elevated carcinoembryonic antigen need to undergo other tests as prescribed by their doctor to clarify the disease.