CEA (Carcinoembryonic Antigen) — Tumor Marker: Range, Causes of Elevation

Updated: June 2025

CEA (Carcinoembryonic Antigen) is a glycoprotein used for monitoring colorectal cancer and other GI malignancies. Also elevated in lung, breast, and pancreatic cancers.

Reference Range

0–5 нг/мл (некурящие), 0–10 нг/мл (курящие)

Causes of Elevation

• Colorectal cancer
• Pancreatic cancer
• Lung, breast cancer
• Smoking (moderate elevation)
• Chronic inflammatory bowel disease
• Liver cirrhosis

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