Quick Facts
- Sample: Blood
- Fasting: No fasting required, but stop biotin consumption at least 72 hours before your blood draw
- Turnaround: 1-2 business days. May take longer due to weather, holidays, or lab delays.
What This Test Measures
This test measures carcinoembryonic antigen (CEA), a protein that can appear in your blood in connection with certain cancers, particularly cancer of the large intestine (colon and rectal cancer). CEA may also be present with prostate, liver, thyroid, pancreatic, breast, ovarian, or lung cancer. CEA is considered a tumor marker, meaning it is a substance found in blood, tissue, or other body fluids that may signal cancer or certain noncancerous conditions.
Not every cancer produces CEA, so a normal result does not rule out cancer, and some noncancerous conditions such as inflammation, cirrhosis, peptic ulcer, ulcerative colitis, rectal polyps, emphysema, and benign breast disease can raise CEA levels, as can smoking. This test is primarily used to help monitor cancer treatment, including response to therapy and recurrence, to help indicate tumor burden and assist with cancer staging, and on occasion as a follow-up to a positive cancer screening test to see whether levels return to normal after treatment.
Benefits
- Helps monitor response to cancer treatment over time
- May help assess tumor burden to assist in cancer staging
- Supports recurrence monitoring during and after treatment
- Can be used as follow-up after a positive cancer screening test
- Convenient blood test, no insurance or doctor's note required
- Simple sample collection with a short turnaround time
Who Is This Test For?
- People currently undergoing monitoring for cancer treatment response
- People whose healthcare provider is tracking CEA levels for recurrence
- People whose provider is assessing tumor burden or assisting with staging
- People following up after a positive cancer screening test
- People whose healthcare provider has recommended CEA monitoring
How It Works
- Order Your Test Online
- Visit a Local Lab
- Get Results Online
FAQ
1. What is the purpose of this test, and who is it for?
This test measures carcinoembryonic antigen (CEA), a tumor marker protein in your blood. It is primarily used to help a healthcare provider monitor response to cancer treatment, track for possible recurrence, assess tumor burden to assist with cancer staging, or follow up after a positive cancer screening test to see whether levels return to normal after treatment. It may benefit people whose provider is monitoring them for one of these reasons, or whose provider has specifically recommended CEA testing. This test does not diagnose cancer on its own, is not intended as a standalone screening test, and does not replace clinical evaluation, imaging, or pathology. Your healthcare provider can help determine if this test is appropriate for your situation.
2. How does this test differ from other cancer-related tests?
This test measures only one biomarker, CEA, from a blood sample, and its supported role is limited to the monitoring, staging, and screening follow-up uses described above. It is not itself a screening test, and it does not confirm a specific cancer type, since CEA can be associated with several different cancers as well as certain noncancerous conditions. The source does not support direct comparisons to other specific cancer-related tests.
3. Do I need to fast before this test?
No fasting is required for this test. However, you should stop biotin consumption at least 72 hours prior to your blood collection, as biotin can interfere with results.
4. How quickly will I get results?
Results are typically available in 1 to 2 days, though this may take longer depending on weather, holidays, or lab delays.
5. How do I interpret the results?
Interpreting your CEA result depends on your specific level, your medical history, and other clinical findings. An elevated CEA level does not automatically confirm that cancer is present, since certain noncancerous conditions such as inflammation, cirrhosis, peptic ulcer, ulcerative colitis, rectal polyps, emphysema, or benign breast disease, as well as smoking, can also raise CEA. A normal CEA level does not automatically rule out cancer, since not all cancers produce this marker. If your provider is using this test for monitoring, changes in your CEA level over time may provide useful context, but they do not by themselves confirm a particular clinical outcome. Results are generally considered alongside other laboratory findings, imaging, or clinical evaluation.
Disclaimer: Reference ranges may vary by laboratory. Listed ranges are general guidelines and may differ from those used by the performing lab. Always consult your healthcare provider for interpretation.
6. What should I do if my results are abnormal?
Discuss an abnormal CEA result with a qualified healthcare provider who can review it alongside your medical history and other clinical information. An abnormal result does not by itself mean cancer is present, and your provider may consider additional evaluation based on their clinical assessment.
7. How often should I get tested?
How often you should get tested depends on your individual situation and the reason your provider is monitoring your CEA level, such as tracking treatment response or watching for recurrence. Follow the testing schedule recommended by your healthcare provider.
Pre-test preparation
No fasting is required for this test. Stop biotin consumption at least 72 hours prior to your blood collection, as biotin can interfere with results.
