CEA is a type of protein found in the body. It can be detected through blood tests and is used primarily for diagnosing cancer, especially colon cancer. Smokers or individuals with internal organ inflammation, such as in the colon or gallbladder, often have CEA levels higher than normal.
Conditions in which CEA levels may be elevated:
Cancers:
- Colon cancer
- Lung cancer
- Thyroid cancer
- Stomach cancer
- Gastrointestinal cancer
- Breast cancer
- Pancreatic cancer
Other conditions caused by internal organ inflammation:
- Smoking
- Gallbladder inflammation
- Pancreatitis
- Cirrhosis
- Chronic kidney disease
- Inflammatory bowel disease
- Stomach ulcers
- Irritable bowel syndrome
Normal CEA levels:
Normal CEA levels range between 0 – 4.7 ng/mL.
Diagnosis of colon cancer:
- The accuracy of using CEA to diagnose colon cancer is approximately 30-80%. Therefore, additional evidence, such as a biopsy for pathological examination, is required for confirmation.
- CEA levels can indicate disease severity. A CEA level exceeding 5 ng/mL is associated with greater disease severity.
- CEA levels typically return to normal 4-6 weeks after complete treatment.
Preparation Before Undergoing a CEA Test
No need to fast or avoid food and drinks before the test.
