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(A) Spindle cells of sarmocomatous areas whirled around carcinomatous component (H&E, ×200). (B) Giant cells are admixed with spindle cell components (H&E, ×200). (C) Spindle cells show immunoreactivity for cytokeratin 7 (×400). (D) TTF-1 nuclear stainings are detected in spindle cells in sarcomatous area (×400).
