Fig. 1. (A) Follicular carcinoma, subtype follicularecompact. HE. Bar, 100 mm. (B) Expression of thyroglobulin in (A). IHC. Bar, 20 mm.(C) No expression of calcitonin in (A). IHC. Bar, 20 mm. (D) Medullary carcinoma. HE. Bar, 100 mm. (E) No expression of thyroglobulinin (D). IHC. Bar, 20 mm. (F) Expression of calcitonin in (D). IHC. Bar, 20 mm.