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Less intrusive breast cancer treatment can save many lives

02 October 2015, 10:04

In just three decades, the once monolithic approach to diagnosing and treating breast cancer has become more personalised and less intrusive a transformation that likely saved millions of lives, experts say.

From testing methods adapted to an individual's level of risk, better drugs and selective use of chemotherapy, treatment is no longer a one-size-fits-all for some 1.6 million people diagnosed with the disease every year.

Breast cancer the leading killer

"In the past few decades, we have witnessed major changes and improvements in the treatment of breast cancer," Justin Stebbing, a professor in cancer medicine at Imperial College London, told AFP.

Despite advances, breast cancer remains the leading cancer killer of women aged 20-59 worldwide. Every year the disease claims more than half a million lives, according to the World Health Organisation.

Taking a bite out of this grim toll through better awareness is the goal of October's Breast Cancer Awareness Month, which will see the Eiffel Tower glow pink, and a fashion show in London starring cancer survivors.

Much has changed since the 1980s, when mastectomy or surgical removal of the breast was the go-to treatment for all types of breast cancer.

Today's approach prefers to target just the tumour, called a lumpectomy.

Not only are better drugs available, but doctors also have a much better understanding of disease variations between patients, requiring different therapies.

Central role of chemotherapy questioned

The hormone treatment Tamoxifen, for example, effective against 70 percent of breast cancers, has become key in treating pre-menopausal women since trials in the 1980s.

At the same time, an alternative called Anastrozole is effective in women who have already gone through menopause, said Aine McCarthy, a doctor and spokeswoman for charity group Cancer Research UK.

Research in recent years has questioned the central role of chemotherapy in cancer treatment, with a study in the New England Journal of Medicine saying some women in the early stages of the disease may not need it.

"In some low-risk patients we know that chemotherapy is of no use; in others, it is indispensable," said Roman Rouzier, a cancer expert at the Institut Curie research centre in Paris.

While most developed nations recommend regular testing for women from about the age of 50, some advise earlier examination for those with breast cancer in the family, or a gene mutation that raises their risk.

Carriers of the BRCA1 mutation have a lifetime risk of about 80 percent of developing breast cancer, compared to about 10 percent for women without it.

Saving hundreds of thousands of lives

About 0.2 percent of women, or one in 500, carry a harmful mutation in the BRCA1 or the less dangerous BRCA2 gene (BRCA stands for BReast CAncer susceptibility).

The genetic flaw accounts for a small number of cancers overall, but has been found in half of families with multiple cases of breast cancer, and in up to 90 percent of those with both breast and ovarian cancer.

With today's higher level of care, the five-year survival rate of people diagnosed with breast cancer now hovers at 80 percent in most western nations, according to the WHO.

The percentage is half that in the poorest countries.

McCarthy said that if you figure survival rates have nearly doubled over the past 20 years, many who would have died in past decades have survived.

"We're saving hundreds of thousands of lives per year," she added. "That's a lot of women's lives that are being saved worldwide."

Image: Breast examination from iStock


Tags health

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