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1Secretory breast carcinoma in a 10 years old boy显示文摘1 Introduction Secretory breast carcinoma(SBC) is a rare(< 1%) type of breast carcinoma,which was initially termed 'Juvenile breast cancer' by McDivitt and Stewart,based on the fact that the average age of the 7 patients described in their report was 9 years old with a range of 3 to 15 years[1].It is most common under the age of 30,and it is the most common type of breast carcinoma in children[2].Although firstly described in children and adolescents,it is now known to occur in adults of both sexes[3],and male to female ratio is 1:6[4].The tumor is the only epithelial tumor of the breast with a balanced translocation,t (12;15),that creates an ETV6-NTRK3 gene translocation[3].The biological consequence of this translocation is the fusion of the dimerization domain of a transcriptional regulator (ETV6)with a membrane receptor tyrosine kinase (NTRK3) that activates the RasMekl and PI3K-Akt pathways which are important for breast cell proliferation and survival.This specific translocation is associated with congenital fibrosarcoma and mesoblastic nephroma,2 morphologically similar pediatric mesenchymal tumors with no epithelial features[5].ZHOU Xin 2013中华内分泌外科杂志2013,7,5:0
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