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Estradiol receptor levels in human breast carcinomas
Canadian Medical Association Journal
|April 15, 1981
Summary
Physicians use estradiol receptor levels in breast tumors to guide hormonal therapy decisions. Higher receptor levels were found in primary tumors of older patients and in lymph node metastases.
Area of Science:
- Oncology
- Endocrinology
- Biochemistry
Background:
- Estradiol receptor presence in tumor cells guides hormonal therapy for metastatic breast cancer.
- Accurate measurement of estradiol receptors is crucial for treatment decisions.
Purpose of the Study:
- To quantify estradiol receptor levels in primary and secondary breast tumors.
- To analyze the correlation between receptor levels and patient age or metastatic site.
Main Methods:
- Measured estradiol receptor levels in the cytosol of 228 primary and secondary breast tumors.
- Utilized a sensitive multiple-point assay with dextran-coated charcoal separation.
- Analyzed data using Scatchard plots.
Main Results:
- 53% of primary (175) and 32% of secondary (53) tumors showed positive results.
- Mean receptor levels in primary tumors increased significantly with patient age.
- Positive results were more frequent in lymph node samples than skin nodules for metastatic lesions.
Conclusions:
- Estradiol receptor status is a key biomarker in breast cancer management.
- Age and metastatic site may influence receptor positivity in breast cancer.