Oestrogen Receptor Status in Breast Cancer and Its Impact on Survival
Author Information
Author(s): C. Kamby, B. Bruun Rasmussen, B. Kristensen
Primary Institution: The Finsen Institute, Copenhagen University Hospital
Hypothesis
The study aims to describe and compare the immunohistochemical ER content in primary breast cancer, involved regional lymph nodes, and subsequent distant metastases.
Conclusion
The study shows that the ER status of the primary tumour is an important prognostic factor for survival after recurrence in breast cancer.
Supporting Evidence
- 40% of primary tumours were ER positive, while less than 20% of liver and bone marrow metastases were ER positive.
- The ER status of regional lymph node metastases was concordant with that of the primary tumour in 90% of cases.
- Patients with ER positive primary tumours had significantly longer survival after recurrence.
Takeaway
This study looks at how the presence of certain receptors in breast cancer affects how long patients live after their cancer comes back.
Methodology
The study used immunohistochemical techniques to analyze ER status in tissue samples from primary breast cancers and their metastases.
Potential Biases
There is a risk of misclassifying slightly positive tumours as negative.
Limitations
The study may have false negatives due to receptor loss during tissue processing.
Participant Demographics
The mean age at recurrence was 53 years, with a range of 30-74 years.
Statistical Information
P-Value
0.0011 for primary tumour ER status
Statistical Significance
p<0.05
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