Thyroid nodule other diagnostic studies
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Other Diagnostic Studies
The most important diagnostic test to differentiate thyroid nodules from each other is fine needle aspiration (FNA). As FNA is considered as an aggressive procedure, the American Thyroid Association developed the following criteria for FNA indication:
- Nodules ≥ 1 cm with intermediate or high suspicion US pattern
- Nodules ≥ 1.5 cm with low suspicion US pattern
- Nodules ≥ 2 cm with very low suspicion US pattern (e.g., spongiform). Observation an alternate option
- For nodules that do not meet the above criteria, FNA is not required, including nodules < 1 cm (with some exceptions) and purely cystic nodules 26462967