ABSTRACT
Breast carcinoma is the most common non-skin malignancy in women. More recently, it has been suggested that extracellular proteinase has also regulated growth factors and cytokines that might contribute to tumor progression. CD10 is a 90-110kd cell surface zinc-dependent metalloproteinase. Since CD10 is structurally similar to matrix metalloproteinase and stromelysin, it might facilitate cancer cell invasion and/or metastasis. The aim of this study was investigation the rate of CD10 expression in the stromal cells of invasive ductal breast carcinomas, Immunohistochemical aspects, then any other aspects to be able to clarify its correlation with other clinicopathological factors of this disease. One hundred patients with histopathologic diagnosis of invasive ductal carcinoma and 50 patients with fibroadenoma of breast [as the control group] have selected, then 150 paraffin blocks have obtained. The stained slides by immunohistochemistry method for CD10 marker have examined separately by two pathologists, and discrepancies have reviewed in common session to get the final result. Stromal CD10 has detected in 28% of the IDC. No kind of immunoreactivity has identified in the stromal cells of normal breast. Stromal CD10 expression in IDC has significantly correlated with increasing tumor size [p<0.001], increasing histologic grade [p<0.001], the presence of nodal metastases [p<0.001] and estrogen receptor negative status [p=0.003]. Stromal CD10 expression in IDC has closely correlated with invasion and metastasis and it might play an important role in the pathogenesis of IDC