DICER1 and poorly differentiated thyroid gland carcinoma: In addition to TFND, differentiated thyroid carcinoma [1, 5] and poorly differentiated thyroid carcinoma [6, 7] have been described in childhood or adolescence related to germline DICER1 mutations, while thyroblastoma is more common in adults and is typically associated with somatic mutations in DICER1 [8].