The clinical value of multiple steroid receptor assays in breast cancer management.
AffiliationClinical Research Laboratories and Department of Radiotherapy, Christie Hospital and Holt Radium Institute, Manchester, England
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AbstractMeasurement of cytoplasmic estrogen (REc) and progesterone (RPc) receptors in human breast tumors together with estrogen receptor activity in the residual pellet ("nuclear" REN) provides a more accurate prediction of hormonal dependence that REc alone. Of 74 patients with advanced metastatic breast cancer, 57% of those with REc+ tumors had an objective response to endocrine manipulation. Of 51 patients whose tumor was assayed for both REc and RPc activity, 9 of 12 patients with REc+ RPc+ tumors showed remission, whereas only 3 of 30 patients with REc- RPc-, 2 of 6 with REc+ RPc-, and 2 of 3 with REc- RPc+ tumors had a clinical response. In a group of 19 patients where triple assay was performed, 5 of 6 with tumors positive for all three receptors responded, whereas 9 patients with triple negative tumors all showed no remission. Fifty-nine percent of primary and 60% of metastatic tumors with REc+ activity were also shown to be RPc+. Thirteen percent of REc- tumors were RPc+. Patients with REc+ RPc+ primary tumors tended to have a longer disease-free interval than patients with RPc- tumors, irrespective of whether the tumors were REc+ or REc-. In the light of the possibility of employing receptor status of the primary tumor to predict hormonal responsiveness in subsequent recurrences, a comparison is made of receptor status measured in primary tumors and metastases.
CitationThe clinical value of multiple steroid receptor assays in breast cancer management. 1980, 46 (12 Suppl):2939-45 Cancer
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