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Immunohistochemistry of the TLFCK in patient 1 (×400). (A) TG(−), (B) TTF-1(−), (C) CK(+) and (D) Vimentin(+). TLFCK, thyroid-like follicular carcinoma of the kidney; TG, thyroglobulin; TTF-1, thyroid transcription factor-1; CK, cytokeratin. EnVision staining.
