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A. Tall-columnar tumor cells with eosinophilic cytoplasm and round or ovoid nuclei. Nuclei arrange in a palisading pattern, with some cells possessing prominent nucleoli and mitotic figure. B. Irregular glandular cavity with significant necrosis like MCC, the mesenchyma was composed of loose fibrous tissue and inflammatory cells. C. Tumor cells with a strong diffuse positivity for CK7. D. Carcinoma, strongly positive for villin in the brush border.
