A thyroid nodule FNA cytology is reported as Bethesda Category IV (follicular neoplasm). The risk of malignancy for this category is:
- A 1–4%
- B 15–30% ✓
- C 60–75%
- D 97–99%
Correct answer: B. 15–30%
Explanation
Bethesda Category IV (Follicular Neoplasm/Suspicious for Follicular Neoplasm) carries an estimated malignancy risk of 15–30% in the revised 2023 Bethesda system. This risk is higher than Category III (AUS/FLUS, ~10–30% but lower average) and mandates diagnostic surgical lobectomy to allow histological assessment of capsular and vascular invasion.
Reference: Bailey & Love's Short Practice of Surgery, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.