Fig. 1From: Selpercatinib for treating recurrent mixed medullary and follicular cell-derived thyroid carcinoma: a case reportPreoperative ultrasonography and computed tomography (CT) scan. Ultrasonography revealed a hypoechoic nodule with internal calcification in the right thyroid lobe (a) and a hypoechoic mass in the superior mediastinum (b). CT scan showed a solid tumor with internal calcification in the right thyroid lobe (c) and a solid tumor with contrast enhancement in the superior mediastinum (d)Back to article page