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ISSN: 1233-9687
Polish Journal of Pathology
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vol. 68
Case report

Solitary breast metastasis from oestrogen receptor-positive pulmonary adenocarcinoma: report of a case with a potential pitfall

Gábor Cserni

Pol J Pathol 2017; 68 (2): 168-172
Online publish date: 2017/09/01
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Solitary breast metastases are rare and mimic primary breast carcinoma. A 60-year-old female with a history of pulmonary adenocarcinoma presented with a solitary left breast lump suspicious for malignancy on breast imaging. Core-needle biopsy disclosed an adenocarcinoma strongly and diffusely positive for oestrogen receptors. Further immunohistochemistry was consistent with the breast tumour being a solitary metastasis of her pulmonary cancer. Clinicians and pathologists should be aware of the fact that pulmonary adenocarcinomas may sometimes display strong rather than only focal positivity for oestrogen receptors by immunohistochemistry and may mimic breast cancer of no special type.

breast metastasis, oestrogen receptor, mammary carcinoma of no special type, pulmonary adenocarcinoma

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