Newly developed diffuse sclerosing papillary thyroid carcinoma during follow-up of benign thyroid nodules: a case report of two cases with ultrasound findings

Fig. 4 Case 2: Cut surface of resected thyroid shows diffusely paler background parenchyma and three nodules; follicular nodular disease (blue arrow), papillary thyroid carcinoma (white arrow), and oncocytic adenoma (black arrow) (a).Diffuse sclerosing papillary thyroid carcinoma is not present in oncocytic adenoma (black arrow) (b).Nodule marked with white arrow in Fig.4a shows classic papillary thyroid carcinoma (c).(b: hematoxylin and eosin-stained preparation, 2, c: hematoxylin and eosin-stained preparation, 4).a