Study of Oestrogen Receptor Negative- Progesterone Receptor Positive Breast Tumours
Author Information
Author(s): M.F. Pichon, E. Milgrom
Primary Institution: Laboratoire de Biochimie Hormonale and INSERM U. 135, CHU de Bicetre
Hypothesis
What are the characteristics and prevalence of oestrogen receptor negative-progesterone receptor positive breast cancers?
Conclusion
Only a small number of breast cancers are oestrogen receptor negative and progesterone receptor positive, and this phenotype may be due to various factors including hormonal treatment.
Supporting Evidence
- 5.78% of the studied breast tumours were found to be ER(-) PgR(+).
- Two tumours were identified as true ER(-) PgR(+) by all methods.
- Ten tumours displayed high PgR concentrations despite being ER(-).
- Some tumours may have non-binding forms of ER.
- Monoclonal antibodies provided better detection of receptors than traditional methods.
Takeaway
Some breast cancers can be tricky because they don't have the usual receptors we look for, which makes them special and needs more study.
Methodology
The study involved reassessing breast tumours using various techniques including Elisa and immunocytochemistry.
Limitations
The study may not account for all factors influencing receptor status, and the sample may not represent all breast cancer cases.
Participant Demographics
The study included a diverse group of patients with primary or metastatic breast cancers.
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