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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.
Created for people with ongoing healthcare needs but benefits everyone.
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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