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A member asked:
Is it possible for a patient to see serial cea doubling time of 3 months due to non-cancer causes, like alzheimer or lung fibrosis? if not, does the rapid cea doubling time likely indicate cancer metastasis?
2 doctors weighed in across 2 answers
We basically only order CEA levels to follow known colon cancer cases. There are many causes of elevated CEA levels unrelated to malignancy. The upper limit of normal levels is 2.9 but values as high as 35 have been reported in.nonmalignant conditions. For this reason CEA levels are not good as a screening tool.
Answered 10/8/2022
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CEA is typically ordered in patients being followed for colorectal cancer and doubling in value in 3 months has to be assigned to cancer progression/ activity until proven otherwise.
Answered 10/8/2022
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