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Figure 4: (Immunohistochemistry × 400): The tumor showed immunopositivity for thyroid transcription factor-1 (a) cytokeratin 19 (b) cytokeratin 7 (c) and epithelial membrane antigen (d) It was negative for cytokeratin 20

Figure 4: (Immunohistochemistry × 400): The tumor showed immunopositivity for thyroid transcription factor-1 (a) cytokeratin 19 (b) cytokeratin 7 (c) and epithelial membrane antigen (d) It was negative for cytokeratin 20