Malignancy risk of thyroid nodules with minimal cystic changes: a multicenter retrospective study. - Yoo Jin Lee; Jee Young Kim; Dong Gyu Na; Ji-hoon Kim; Minkyung Oh; Dae Bong Kim; Ra Gyoung Yoon; Seul Kee Kim; Seongjun Bak (Ultrasonography, 2022)