Fig. 14. Suppurative thyroiditis in 10-year-old boy who presented with palpable mass with erythema and tenderness in left side of neck for 3 days.

A. Transverse ultrasonography scan shows ill-defined, heterogeneous, hypoechoic lesion (arrows) in left lobe of thyroid gland. B. Contrast computed tomography scan shows ill-defined low-density lesion (arrows) in left lobe with surrounding inflammation. C. Esophagogram shows pyriform sinus fistula (arrow) that was cauterized with 5% trichloroacetic acid.