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. 1993 Apr;67(4):749–753. doi: 10.1038/bjc.1993.136

Immunohistochemical localisation of pS2 protein in ductal carcinoma in situ and benign lesions of the breast.

Y A Luqmani 1, T Campbell 1, S Soomro 1, S Shousha 1, M C Rio 1, R C Coombes 1
PMCID: PMC1968340  PMID: 8385977

Abstract

The expression of pS2 was examined histochemically in paraffin sections taken from biopsy material from patients diagnosed with ductal carcinoma in situ (DCIS). Often intense immunoreactivity, to an anti-pS2 monoclonal antibody, was observed in comedo, solid, cribriform and micropapillary types of DCIS, with significant positivity found in 63-67% of cases. In 15 samples analysed, we found a good correlation between pS2 expression and presence of progesterone receptor positive cells, but not with estrogen receptor. There was only a limited degree of correspondence between the cells staining with these anti-sera. Some pS2 positive cells were also seen in normal acini in areas adjacent to cancer but much less frequently in sections of normal breast from reduction mammoplasty. Most normal areas were negative, as were cysts. In benign proliferative conditions (seen in sections with and without DCIS) such as adenosis, sclerosing adenosis, mild and florid ductal epithelial hyperplasia, significant pS2 positivity was seen in about 50% of cases. These results suggest that there is a progressive increase in pS2 from normal to benign to cancer cells and that this gene is expressed in both the invasive and pre-invasive forms of breast cancer.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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