Table 1.

Distribution of diagnostic categories of TBSRTC

FNAC diagnostic category	No. (%)
I. Non-diagnostic	727 (13.1)
II. Benign	2,125 (38.3)
III. Atypia of undetermined significance (AUS)	882 (15.9)
IIIA. AUS-NA	542 (61.4)
IIIB. AUS-MF	132 (15.0)
IIIC. AUS-HC	73 (8.3)
IIID. AUS-others	135 (15.3)
IV. Follicular neoplasm	44 (0.8)
V. Suspicious for malignancy	499 (9.0)
VI. Malignant	1272 (22.9)
Total	5,549 (100)

TBSRTC, the Bethesda System for Reporting Thyroid Cytopathology; FNAC, fine-needle aspiration cytology; NA, nuclear atypia; MF, microfollicles; HC, Hurthle cells.