Hi doctor! I had a right colon tumor that was removed in 2017, I went for a routine check-up, and the doctor said the indicators were normal and no need for a colonoscopy. I feel worried because many times before, I have been examined and tested, but I can't find anything, but only after colonoscopy can I detect it. The strange thing for me is that when I have a test for surgery, the CEA index is still low. So I wonder if I should do a colonoscopy myself to check or not and should I do a regular colonoscopy or sedation? After 8 months of surgery, I had the endoscopy again and the results were normal (March 2018). What do I need to do if I want a gastroscopy with anaesthesia? What tests are needed and can I have them first? Please consult your doctor. Thank you!

CA 19-9 is a tumor marker used in the diagnosis, assessment of patient response to treatment, and monitoring of patients with pancreatic or hepatobiliary cancer. In the diagnosis of pancreatic cancer, the presence of symptoms of pancreatic or biliary obstruction and elevated CA 19-9 will help the physician conclude the risk of pancreatic cancer rather than a benign pancreatic tumor.

After being diagnosed with cancer, tumor progression is often not obvious. The doctor needs to do an additional test for CarcinoEmbryonic Antigen - called CEA for short, to measure the protein in the blood. The CEA test helps to monitor the progression of the disease as well as the effectiveness of the current treatment regimen.

CEA is an antigen present in the intestinal cells of the fetus and when mature, only very low concentrations are present in the blood. When patients have cancer, especially carcinoma, CEA levels increase. Cancers of the stomach, intestines, breast, lung, pancreas... also often have elevated CEA.

Colon cancer is a disease in which malignant cells develop in the colon. Currently, with the development of medicine, there are many methods of screening and detecting colon cancer. In which, a blood test that measures CEA levels is performed by doctors, providing fast and accurate results.