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A 23-year-old female asked:

I have bilateral partially cystic thyroid nodules.biopsy done of the larger one, came back "follicular lesion of unknown origin" what does that mean?

1 doctor answer1 doctor weighed in
Dr. David Sneid
Endocrinology 43 years experience
Variable meaning: Follicular‐patterned lesions of the thyroid are common; these include hyperplastic/adenomatoid nodules, follicular adenoma, follicular carcinoma and follicular variants of papillary carcinoma. Repeat biopsy with a sample sent for a genetic afirma assay may give additional useful information. In addition, discuss with your endocrinologist.
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Last updated May 17, 2013

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