Surgery · Thyroid and Parathyroid Surgery

A 30-year-old woman has a 2 cm thyroid nodule. FNAC shows Bethesda Category III (AUS/FLUS). According to the Bethesda System, what is the estimated risk of malignancy for this category?

A 5-10%
B 10-30% ✓
C 25-40%
D 45-60%

Correct answer: B. 10-30%

Explanation

Bethesda Category III (Atypia of Undetermined Significance/Follicular Lesion of Undetermined Significance) carries an estimated malignancy risk of 10-30%. Category I is 0-3%, Category II is 0-3%, Category IV is 25-40%, Category V is 50-75%, and Category VI is 97-99%.

Reference: Thyroid Fine-Needle Aspiration, 2nd ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

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