Immunohistochemical expression of HBME-1 in PTC (A, B), the other benign follicular-patterned lesions with suspicious nuclear features (C-E), and WDT-UMP (3F). (A, B) Positive expression in CVPTC and FVPTC (x100); (C-E) Negative expression in FA, HN, LT (x100); (F) Focal weakly positive expression in WDT-UMP (x40).