Carcinoembryonic Antigen (CEA)

Carcinoembryonic Antigen (CEA) is a blood test that measures a protein that may be elevated in certain types of cancer, particularly colorectal cancer. It is most commonly used to monitor treatment response and detect possible recurrence in individuals with a known diagnosis.

CEA testing helps assess:
• Monitoring colorectal cancer treatment
• Detecting possible recurrence
• Tracking disease progression over time
• Supporting ongoing cancer surveillance

Reference Range (General Guidance)
Typically <3.0 ng/mL for non-smokers
Up to <5.0 ng/mL may be seen in smokers
(Ranges may vary slightly by laboratory.)

What Your Results May Mean
• Within Range: Generally consistent with no significant elevation.
• Elevated: May be associated with colorectal or other cancers, but can also be elevated in smokers, inflammatory conditions, liver disease, or other benign causes. Results should always be interpreted in clinical context.