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A member asked:
If cea levels are high (10-13) & all tests clear of any cancer can smoking be the only reason for such high cea? what would be normal cea?
A doctor has provided 1 answer
Yes: Normal CEA is generally below 5. By the way, CEA is not a screening test. It is used to follow diseases that exist and hint, sometimes, at recurrence. If someone has a cancer, such as colon cancer, and is getting a CEA for follow-up, if they are a smoker, it might be elevated as you stated.
Answered 1/12/2016
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