Preventive Double Mastectomy

May 27, 2013 by  

Preventive Double Mastectomy, In the aftermath of Angelina Jolie’s recent disclosure about having had a preventive double mastectomy, there have been several thoughtful articles that are worth reading, including the piece below from Hilda Bastian, first published at Scientific American blogs.
Keep health risks in perspective when the dramatic and rare goes culturally viral

Hilda Bastian writes:

It was a singular act of courage for Angelina Jolie to so openly reveal her fears and preventive double mastectomy. She just amazes, again and again.

Along with admiration and sympathy for her, many will be hoping that this extends to greater understanding of others in much the same boat as Jolie.

All sorts of reactions were swift, sometimes including expectations that this would save lives and raise awareness, too. Maybe it will. That would be great. And I hope we can take for granted that understanding and sympathy will spread.

But we can’t assume these bursts of attention to the health issues affecting famous people inherently and inevitably translate into health benefits.

Kylie Minogue’s breast cancer diagnosis, for example, led to a change in screening behavior – but not necessarily among those who could have benefited. And like “the Couric effect” on colonoscopies, “the Minogue effect” didn’t last.

Anything powerful enough to have a positive effect usually also has the potential to have unintended adverse ones, as well. Consider what it means when people not at high risk decide to go for screening.

The National Cancer Institute (NCI) estimates that perhaps more than half of all breast cancer diagnoses are over-diagnoses.

That means that breast cancer would never cause illness or suffering. The diagnosis itself and treatments that follow may well cause a lot of suffering, though. Peggy Orenstein recently wrote movingly about that in the NY Times recently.

Jolie wrote a carefully worded piece, but much of that care might get lost in the wave that follows this cultural tremor.

Her situation is one that anyone would need great courage to face. But the situation is, fortunately, rare. Having a relative with breast cancer isn’t rare though, so the potential for fear of risks to be spread by others is high.

Preventive double mastectomy – or bilateral prophylactic mastectomy – has dramatic benefits in women with the specific genetic mutation Jolie describes. But not necessarily for other women.

Less than 1% of American women are in the same boat as Jolie. But how can we be confident that we’ll all be able to keep this, and what could be done about it, in perspective? Even physicians may not have an admirable grasp of risk statistics.

We all need to get better at putting risks in perspective, because dramatic numbers get misapplied in the public arena.

As Kelly-Anne Phillips and colleagues wrote in the New England Journal of Medicine years ago, the scariest possible numbers can get used in breast cancer stories – often that’s the lifetime risk of getting a breast cancer diagnosis in women who lived to be old without dying of anything else.

Our risk of being diagnosed with breast cancer really depends on our age. It accumulates as we get old and survive other more common reasons for dying young. At any age, the average adult woman is more likely to die of something else than breast cancer. Over 40,000 women (in the US) die of breast cancer every year: but over 290,000 women die of heart disease every year, for example.

People still argue that we need much more awareness and attention to breast cancer across the board. Many people do still under-estimate their risks, and knowledge isn’t evenly spread either.

However, substantial parts of our communities are now fearful out of proportion to their actual risk. So we might need to re-think a few things.

We particularly over-estimate the risks of quite young women dying of breast cancer. Media stories about breast cancer are far more likely to be accompanied by images of young women than age-appropriate ones. Many women over-estimate the benefits of mammography.

Women who have had cancer in one breast often over-estimate the risk of cancer in their other breast. Many women who have had a preventive double mastectomy, without having the kind of gene mutation that Jolie has, don’t necessarily have an accurate idea of their actual risk.

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