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A 53-year-old female asked:

1cm cancer found after total thyroidectomy last may. new pet shows no cancer but-tsh was .02 w/ 100mcg levothyroxine during test. results accurate?

1 doctor answer2 doctors weighed in
Dr. Stuart Seigel
Endocrinology 15 years experience
Yes: A PET scan works regardless of your tsh. The TSH should be elevated if you were to get a radioactive iodine scan. A PET scan does not require that.
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Dr. Stuart Seigel
Endocrinology 15 years experience
Provided original answer
Keep in mind however that an elevated tsh at the time of a pet scan may be slightly more accurate. It is just not generally required for the scan. Also a PET scan is not 100% sensitive for detecting very small residual tumors. You should always listen to your prescribing endocrinologist about this as there may be a reason why he feels the PET was not as accurate.
Mar 5, 2015
Last updated Mar 15, 2015


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