Cancer & Tumor Marker Tests

Cancer and tumor marker blood tests are diagnostic tools used to detect specific substances, known as tumor markers, that may be elevated in the blood of individuals with cancer. These tests involve analyzing a blood sample drawn from a vein to measure the levels of certain proteins, hormones, enzymes, or other molecules associated with particular types of cancer. Tumor markers can indicate the presence of cancer, monitor the progression of the disease, assess response to treatment, and detect potential recurrence. Common tumor markers include prostate-specific antigen (PSA) for prostate cancer, CA-125 for ovarian cancer, CA 15-3 and CA 27.29 for breast cancer, and CEA for colorectal and other gastrointestinal cancers. While elevated levels of tumor markers can suggest the presence of cancer, they are not definitive proof of the disease and may also be elevated in non-cancerous conditions. Therefore, these tests are often used in conjunction with other diagnostic methods, such as imaging studies and biopsies, to aid in the diagnosis and management of cancer. Interpretation of tumor marker blood test results requires careful consideration by healthcare professionals in the context of the individual's medical history and other clinical findings. These tests play a valuable role in cancer detection and management, helping to guide treatment decisions and monitor disease progression over time.