Hong AR, et al. - The physicians conducted this work to explore the clinical characteristics and natural course of adrenal incidentalomas (AIs) in a single center over 13 years in order to validate the clinical application of the follow-up strategies suggested by the 2016 European Society of Endocrinology (ESE)-European Network for the Study of Adrenal Tumors (ENSAT) guidelines. They suggested that no follow-up imaging is needed whether the detected adrenal mass is