Benign thyroid nodule is a common disease. However, little is known about the natural course of it. The objective of the study was to evaluate the changes of ultrasonographic (US) findings and the fine needle aspiration (FNA) cytology. During 2 years, most of them have been in a benign natural course. However, we should note that malignant US findings is strongly associated with papillary thryoid carcinoma, though FNA revealed benign. Among them, our results would suggest that taller than wide feature in US finding is associated with malignancy

• 최영민(조선대학교 의학전문대학원 내과학교실) | Young Min Choi
• 김상용(조선대학교 의학전문대학원 내과학교실) | Sang Yong Kim Corresponding author