TN	thyroid nodule
AUS	atypia of undetermined significance
FLUS	follicular lesion of undetermined significance
US	ultrasound
ROM	risk of malignancy
UG-FNAB	ultrasound-guided fine-needle aspiration biopsy
ATA	American Thyroid Association
TBSRTC	The Bethesda System for Reporting Thyroid Cytopathology
NIFTP	noninvasive follicular neoplasms with papillary-like feature
SD	standard deviation
PTC	papillary thyroid cancer
FTC	follicular thyroid cancer
KTIDS	Korean Thyroid Imaging Reporting and Data System