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Are CEA blood tests effective at diagnosing cancer?

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Gastroenterologist
Practicing since : 1982
Answered : 347 Questions
Question
My cea was 31 and pet scan shows no cancer
My blood sugars have been high since I finished my chemo for colon cancer and my thyroid numbers are out of whack too. Can these factors effect the cea number?
Thu, 26 Apr 2018 in Cancer
 
 
Answered by Dr. Sunil 1 hour later
Brief Answer:
yes they effect level directly.

Detailed Answer:
Hi,
The CEA blood test is not reliable for diagnosing cancer or as a screening test for early detection of cancer especially in patient with other health conditions.Its levels are directly effected by hypo or hyperthroidism.
Therefore in your case its not reliable.

Thank you.
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