Fig. 1. Lung-RADS categories rearranged by Korean Imaging Study Group for Lung Cancer according to nodule type, size, and interval change. Solid (A), part-solid nodule (B), pure GGN (C), and special consideration (D). *Additional features: spiculation, GGN that doubles in size in 1 year, enlarged lymph nodes etc. GGN = ground-glass nodule, Lung-RADS = Lung Imaging Reporting and Data System Fig. 1. Lung-RADS categories rearranged by Korean Imaging Study Group for Lung Cancer according to nodule type, size, and interval change. Solid (A), part-solid nodule (B), pure GGN (C), and special consideration (D). *Additional features: spiculation, GGN that doubles in size in 1 year, enlarged lymph nodes etc. GGN = ground-glass nodule, Lung-RADS = Lung Imaging . . . Korean J Radiol. 2017 Mar-Apr;18(2):402-407. https://doi.org/10.3348/kjr.2017.18.2.402