Findings of fine-needle aspiration cytology in a case of mammary secretory carcinoma

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  • 乳腺分泌癌の穿刺吸引細胞診の 1 例

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Abstract

<p>Background : Mammary secretory carcinoma is an extremely rare malignant tumor classified as a specific type of breast cancer, that accounts for less than 0.1% of all breast cancers. In this article, we present the findings of fine needle aspiration cytology (FNAC) in a case of mammary secretory carcinoma.</p><p>Case : A woman in her 60 s visited our hospital complaining of right chest pain. Examination of stained FNAC specimens revealed red-purplish material that looked like mucus secreted by the epithelium and deeply-staining lipid droplets in a light-green background. The tumor was composed of an abundance of small polygonal cells arranged in small clusters or scattered singly, lacking the two-cell pattern, together with blood vessels. Mucous globular structures (MGS) containing spherical mucus-like material were observed in some intercellular spaces and in the cytoplasm. The cytoplasm was broad and granular, containing some large or small vacuoles, and the cells showed mild nuclear atypia.</p><p>Conclusion : These findings suggest that the most useful approach for the differential diagnosis of mammary secretory carcinoma may be to look for the presence/absence of extracellular material, their properties, and the cell arrangement.</p>

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