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Immunohistochemical detection of steroid receptors in breast cancer: a working protocol


The biochemical assay for the oestrogen receptor has shown the clinical value of knowing the concentration of the receptor within tissue. The immunohistochemical assay is rapidly taking over from the biochemical assay. Therefore, it is vital to have an equivalent scoring system that will have the same predictive value. This paper reports both a practical protocol and a scoring system that should achieve this aim. This approach should be applicable to many more biomarkers detected by immunohistochemistry.

  • breast cancer
  • oestrogen receptor
  • tamoxifen
  • immunohistochemistry
  • external quality control

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