Table 1. Bethesda System for Reporting Thyroid Cytopathology and recommended clinical management.

FNAB: fine needle aspiration biopsy

Diagnostic category	Description	Management
I	Nondiagnostic or unsatisfactory	Repeat FNAB with ultrasound guidance
II	Benign	Clinical and sonographic follow-up
III	Atypia of undetermined significance or follicular lesion of undetermined significance	Repeat FNAB, molecular testing, or lobectomy
IV	Follicular neoplasm or suspicious for a follicular neoplasm	Molecular testing, lobectomy
V	Suspicious for malignancy	Near-total thyroidectomy or lobectomy
VI	Malignant	Near-total thyroidectomy or lobectomy