Bowel cancer blood test should look for blood routine and tumor markers, etc. If patients have symptoms such as change of stool pattern, abdominal pain and blood in stool, they should be examined in time to confirm the diagnosis, so as to avoid delaying the condition.
Colon cancer laboratory check blood routine, biochemistry and tumor markers, in addition, barium double contrast imaging and fiber colonoscopy are needed.
Blood carcinoembryonic antigen is non-specific and has a high positive rate for colorectal cancer, which can be used to monitor whether there is recurrence and metastasis after surgery; CA19-9 is used as one of the tumor markers for diagnosis and monitoring.
For rectum, anal diagnosis is feasible. In addition to blood test, systematic examination can be used for early detection of colorectal cancer; ultrasonography, CT, magnetic resonance and other examinations are of great help in the discovery of tumor invasion and metastasis.
For CEA, CA19-9 and other persistent elevation, or blood routine shows anemia, etc., it is necessary to go to the hospital in time according to the specific conditions for clear diagnosis and guidance of treatment.