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UWE Cancer expert reports new guidelines for breast cancer
20 April 2010
A cancer research specialist from the University of the West of England, Bristol is one of a panel of international experts who have had a report published in the Journal of Clinical Oncology today that gives new global guidelines for testing regimes for breast cancer patients. The guidelines relate to cancer patients with oestrogen and progesterone receptor (ER/PgR) positive breast tumours. This approximates to around 70% of the 42,000 new cases of breast cancer occurring each year in the UK.
The international expert panel was convened by the American Society of Clinical Oncology and the College of American Pathologists to conduct a systematic review of the literature in partnership with Cancer Care Ontario to develop comprehensive evidence based recommendations for optimal ER/PgR testing performance.
Dr Anthony Rhodes from UWE explains, “Not all treatments will be effective on all women who have breast cancer. There are some important tests that need to be carried out to ascertain what treatments will work. Inaccuracies in results on some occasions have led to erroneous results and emphasize the importance of standardising each stage of the testing process so that patients are given the most appropriate treatments.
“About three years ago international guidelines relating to Human Epidermal Growth Factor 2 (HER2) hit the headlines (Journal of Clinical Oncology 2007; 25: 118-45). I was on the panel that determined these guidelines and it is this and previous experience that has led to my involvement in the new set of recommendations that will have an even greater impact in terms of the numbers of patients with ER/PgR positive tumours. It is known that Herceptin is an effective treatment in approximately 25% of patients who show positive results for HER2 and these guidelines had considerable impact globally in helping to standardize the clinical tests that predict the likely response to Herceptin therapy.
“However, a lot more breast tumours (around 70%) are driven by oestrogen which acts as a powerful growth stimulant when it binds to receptors in the tumour cells. The new guidelines relate to the most appropriate testing regimes for oestrogen receptors and progesterone receptors for predicting response to therapies such as tamoxifen. The new guidelines include recommendations for standardised tests for specimen handling, proper use of controls, and interpretive and reporting criteria.
“The key is to reliably identify those patients whose cancers are driven by oestrogen – patients who fall into this category are likely to benefit from the drug tamoxifin, or similar drugs such as aromatase inhibitors. In cases where oestrogen is not driving the tumours growth other drugs are more appropriate.”
The full report is published today in the Journal of Clinical Oncology.
The full report can be viewed at
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