Primary small cell carcinoma of the breast with TTF-1 and neuroendocrine marker expressing carcinoma in situ

International Journal of Clinical and Experimental Pathology

Michael Christie¹ 

关键词: Small cell carcinoma;    Breast;    Thyroid transcription factor-1;    Neuroendocrine;    Carcinoma in situ;   

DOI  :  

学科分类：生理学与病理学

来源: e-Century Publishing Corporation

【 摘 要 】

Primary small cell carcinoma (SmCC) of the breast is very rare and may be difficult to distinguish from me-tastatic small cell carcinoma. Confident histopathological diagnosis of a primary breast SmCC requires the demonstration of an in situ component. We report a case of primary small cell carcinoma of the breast with coexisting carcinoma in situ in which the invasive carcinoma and in situ component both expressed neuroendocrine markers and Thyroid transcription factor-1 (TTF-1) by immunohistochemistry. Expression of neuroendocrine markers and TTF-1 in the in situ component allowed a highly confident diagnosis of primary small cell carcinoma of the breast. To our knowledge there is only one previous report of TTF-1 expressing in situ carcinoma associated with a primary SmCC of the breast.

【 授权许可】

CC BY-NC