Estrogen receptor measurements are presently performed by 16 institutions while 10 laboratories also assay progesterone receptors. Androgen and glucocorticoid receptors are measured by only a very few laboratories. Currently about 6,000 tumor samples, obtained from 150 hospitals, are analyzed for receptor activity per year. Routinely, the time required for response is about 1–3 weeks, while upon request the assay can be performed within 2 days.
KeywordsGlucocorticoid Receptor Gradient Method Quality Control Program Malignant Breast Cancer Scatchard Plot Analysis
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