HMGA2 and goiter: Tumors with elevated expression of HMGA2 or miR-221 or miR-375 were classified as “follicular neoplasms with markers of malignancy” (FNMMs), and tumors with the unchanged expression level of all these markers (HMGA2, miR-221, miR-375)—typical of goiter—were classified as “follicular neoplasms with no markers of malignancy” (FNNMMs; Fig. 6).