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Frontiers of Medicine

ISSN 2095-0217

ISSN 2095-0225(Online)

CN 11-5983/R

Postal Subscription Code 80-967

2018 Impact Factor: 1.847

Front. Med.    2015, Vol. 9 Issue (1) : 112-116     DOI: 10.1007/s11684-014-0345-z
CASE REPORT |
A case of primary neuroendocrine breast carcinoma that responded to neo-adjuvant chemotherapy
Xiaolong Wei1,Chunfa Chen2,3,Didi Xi2,3,Jinwen Bai2,3,Wenhe Huang3,Luoxiang Rong2,3,Mingyao Wu4,Guojun Zhang2,3,*()
1. Department of Pathology, Cancer Hospital of Shantou University Medical College, Shantou 515031, China
2. Cancer Research Center, Shantou University Medical College, Shantou 515031, China
3. The Breast Center, Cancer Hospital of Shantou University Medical College, Shantou 515031, China
4. Department of Pathology, Shantou University Medical College, Shantou 515031, China
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Abstract  

Primary neuroendocrine breast carcinoma (NEBC) is a very rare type of breast cancer. Two characteristic biomarkers, namely, CgA and Syn, should be immunohistochemically detected to diagnose NEBC. In this study, a 43-year-old woman with a large mass of 8.3 cm × 2.9 cm in her right breast was reported. The patient was pathologically diagnosed with NEBC after specific markers, including CgA and Syn, as well as few differential markers, such as CK7, ER, PR, C-erbB-2, NSE, and E-cadherin, were immunohistochemically detected. The patient showed a remarkable response to four cycles of neo-adjuvant chemotherapy (partial response based on RECIST criteria) and sequentially underwent modified radical mastectomy. Moreover, the diagnosis and treatment of NEBC based on this case and available related literature were discussed.

Keywords neuroendocrine carcinoma      neo-adjuvant therapy      breast     
Corresponding Authors: Guojun Zhang   
Online First Date: 11 August 2014    Issue Date: 02 March 2015
URL:  
http://academic.hep.com.cn/fmd/EN/10.1007/s11684-014-0345-z     OR     http://academic.hep.com.cn/fmd/EN/Y2015/V9/I1/112
Fig.1  Mammographic finding of the right breast. (A) Mammographic image of primary NEBC before neo-adjuvant chemotherapy. A lobulated lump with a size of 8 cm×3 cm and high-density echo; enlarged lymph nodes with a diameter of 1.8 cm are also shown. (B) Mammographic image after four cycles of neo-adjuvant chemotherapy. The tumor becomes smaller with a size of 2 cm×1.5 cm; lymph nodes also become smaller.
Fig.2  Representative fields of primary NEBC. A and B show different histological morphologies of the NEBC in different regions. (A) Cells are distributed diffusely; fibrovascular intervals and cell gaps are not well defined. The cytoplasm of the cells was slightly eosinophilic and partly mucoidal. (B) Cells are distributed in a solid and sheeted manner with fibrovascular intervals. Magnification: 400×.
Fig.3  Immunohistochemical phenotype of NEBC. (A) Partially positive expression for CK7; (B) negative expression for CD56; (C) positive expression for NSE; (D) positive expression for Syn; (E) positive expression for CgA. Magnification: 400×.
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