If you are experiencing symptoms of colon cancer, our team will ask about your health history, your family’s history of cancer and risk factors. We may perform diagnostic tests to help determine if you have colon cancer. A diagnosis is often determined through a combination of imaging tests and tissue sampling (biopsy). Diagnostic tests may include the following, though most patients will not require all tests:
- Colonoscopy
- (DRE), a test where your healthcare provider puts a gloved, lubricated finger into your rectum to feel for lumps or growths
- (FOBT) or fecal immunochemical test (FIT)
- DNA tests
- Special blood tests
- Imaging tests, such as a computed tomography (CT or CAT) scan, PET scan, ultrasound or magnetic resonance imaging (MRI) of the abdomen, may be done to look for tumors or other problems. These tests may also be done if colorectal cancer has already been diagnosed to help determine the extent (stage) of the cancer.
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Stages of Colon Cancer
After receiving a diagnosis of colon cancer, our team will try to determine your stage of cancer. The stage of cancer describes how much and far the cancer has spread in your body. It is one of the most important things to know when deciding how to best treat your cancer, including whether your cancer can be removed (resected) with surgery. You may need additional diagnostic tests to help our Pathology team formally assign a stage to your cancer, which is dependent upon the size and spread of the cancer.
The AJCC (American Joint Committee on Cancer) TNM staging system (Stages 0–IV) is commonly used for colon cancer. This staging is especially helpful upon immediate diagnosis since we might not know if the cancer has spread to nearby lymph nodes at that time. A higher number, such as stage IV, means a more advanced cancer. Learn more about the .
