Skip to main content

Login to North West London Pathology – consumables service

If you need a new account or you have a query about your order, please telephone the pathology call centre on 0203 313 5353.

If you have forgotten your password you can reset this yourself. Please click here if you have forgotten your password.

Results Line and Enquiries

0203 313 5353

Carcinoembryonic antigen (CEA)

Category Biochemistry >> Oncology
Test background

CEA is a tumour-associated cell surface glycoprotein of 200 kDa normally expressed in embryonic and fetal gut tissues. It can be elevated in almost any advanced adenocarcinoma including breast, prostate, liver, gastric, lung, pancreatic or ovarian cancer, but has greatest usefulness in colorectal carcinoma. It is rarely elevated early in malignancies. Benign conditions in which a raised CEA may be observed include: hepatitis, cirrhosis, alcoholic liver disease, inflammatory bowel disease (Crohn’s and ulcerative colitis), pancreatitis, bronchitis, emphysema and renal disease. It may also be elevated in heavy smokers.

Clinical Indications

Colorectal cancer

Diagnosis: due to low clinical sensitivity CEA is not recommended for screening. It may aid diagnosis in high risk groups as an adjunctive test.

Prognosis and staging: pre-operative CEA measurement provides prognostic information and can be used in combination with other factors in planning treatment. Raised levels should be evaluated for the presence of distant metastases.

Treatment monitoring: CEA should be measured at the start of treatment for metastatic disease and every 1-3 months during treatment. Increasing concentrations suggest progressive disease.

Surveillance: in asymptomatic patients CEA is the most frequent indicator of recurrence. Measurement of CEA is recommended every 3 months in patients with stage II/III disease for at least 3 years following diagnosis.

General: May be useful in other gastrointestinal malignancies as a general purpose marker for adenocarcinomas, especially for treatment monitoring and surveillance following treatment.

Reference range

≤5 μg/L

Sample & container required SST (gold top) preferred, serum (red top) accepted
Sample volume 0.5 mL
Turnaround time 4 days

Abbott Alinity