Metastatic breast cancer suggested by bile juice and biliary brushing cytology—A case report—

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  • 胆汁・胆管擦過細胞診標本上に転移性乳癌細胞が出現した 1 例
  • Metastatic breast cancer suggested by bile juice and biliary brushing cytology—A case report—

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Abstract

Background : Metastasis from breast cancer to the duodenum is rare. We report the cytological findings of a case with metastatic breast cancer.<br>Case : A woman in her 60’s presented with a mass in her left breast. A total mastectomy was performed. Histopathological examination of the resected specimen revealed the diagnosis of invasive ductal carcinoma of the breast. The patient presented 5 years later with jaundice, and a neoplasm was found in the papilla of the duodenum. Biliary brushing cytology, bile juice cytology, and biopsy of the neoplasm at the duodenal papilla were performed. On cytology, the distinction between atypical cells and benign cells was blurred. Therefore, a diagnosis of metastatic neoplasm rather than primary neoplasm was made. Biopsy of the duodenal neoplasm revealed the diagnosis of metastatic breast carcinoma. The results of immunocytochemistry corresponded to the results of immunohistochemistry of the primary breast cancer.<br>Conclusion : Recognition of the continuity between atypical cells and benign cells in bile juice and biliary brushing cytology is useful for diagnosing metastatic neoplasm. Immunocytochemistry is also useful for distinguishing between primary neoplasm and metastatic neoplasm.

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