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Fake News: Having Dense Breast Tissue is No Big Deal

Originally Posted Mar 18th, 2017

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Nancy M. Cappello, Ph.D.
Nancy M. Cappello, Ph.D. Founder & Director,
Are You Dense, Inc. &
Are You Dense Advocacy, Inc.
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Women with breast cancer and dense breast tissue are also at an increased risk of developing contralateral breast cancer, namely in the other breast and more likely to have interval cancer, described as cancers detected within 12 months after a ‘normal’ mammogram. Interval cancers are more likely to be at a larger size when compared with screen detected cancer. Larger cancers are associated with node metastases and convey worse survival outcomes, even in light of recent advances in treatment.

I am hopeful that a recent Breast Cancer Surveillance Consortium study concluding that breast density exceeds all other risk factors, including obesity, family history, and later in life childbirth, will finally put an end to the fake news that is told, all too often across this county to patients in the examining room, that having dense breast tissue is no big deal.

“The most significant finding in this study is the impact of breast density on development of breast cancer in the population,” said senior author Karla Kerlikowske, MD, professor of medicine and of epidemiology and biostatistics in the UCSF Helen Diller Family Comprehensive Cancer Center. “We found that if breast density could be reduced by a single BI-RADS category, 13.4 percent of breast cancers in both pre-menopausal and post-menopausal women could be averted.”

Currently, adjunct screening is not routinely recommended for women with no other risk factors other than being a female with dense breast tissue. As the greater majority of women who are diagnosed with breast cancer have no known risk factors, other than the possible risk of having dense breast tissue, this screening protocol of mammography alone makes no scientific sense.

While the causal risk of having dense breast tissue is critically important, the more important fact is the standard protocol, a one size fits all approach used for decades for breast screening, is placing women across the globe, who are already at risk of developing breast cancer, further at risk for a missed, delayed and advanced stage cancer which conveys worse survival outcomes. The randomized controlled trials of mammography are conclusive that reducing advanced disease is associated with a reduction in death. While the detection of early breast cancer is the goal, to reduce mortality, we must also demand and seek a corresponding reduction in advanced disease. This will not happen without revising the guidelines for screening the dense breasts, using different technologies in addition to mammography.

The real news is that the breast screening profession has been silent for years about the limitations of mammography in screening the dense breasts and has not educated primary care physicians and patients about the impact of dense breast tissue on the reliability of the mammogram. Too many women, as I did, believe that being dutiful with yearly mammograms guarantee that, in the unlikely event of a breast cancer diagnosis, it will be at an early stage.

It took the relentless determination of patient advocates, mostly advocating alone, who ignited the density reporting movement by connecting the decades of scientific studies with personal stories of advanced disease and death, and, in turn, cultivating legislators to expose the best-kept secret to patients through legislation.

Across the globe, patient advocates, modeling the United States’ grassroots density reporting movement, are exposing the impact of dense breast tissue in their respective countries, such as Australia, Canada, France and the United Kingdom.

A current search in Pub Med revealed 3027 publications on the causal and masking risk of dense breast tissue. The consumers of mammography screening, predominately women, do not need another study for policy makers to act now to develop consensus guidelines for screening patients with dense breast tissue as their only risk factor. Guidelines must include access to adjunct technology to mammography or a bold step to recommend biannual mammography with another technology in-between years or possibly a different technology all-together for screening women with dense breast tissue.

The real news is that having dense breast tissue is a ‘big-league’ deal for the development of cancer, in addition to the risk of having breast cancer diagnosed at a later stage, despite faithful mammography screenings. There is abundant evidence to finally change the standard protocol of breast screening for women with dense breast tissue, removing the barrier to an early diagnosis and, in turn, reducing death from this dream-stealing disease.

 
 
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  • Are You Dense? Fact #1:

    Breast density is one of the strongest predictors of the failure of mammography screening to detect cancer.

     
  • Are You Dense? Fact #2:

    Two-thirds of pre-menopausal women and 1/4 of post menopausal women have dense breast tissue. 

     
  • Are You Dense? Fact #3:

    Adding more sensitive tests to mammography significantly increase detection of invasive cancers that are small and node negative.

     
  • Are You Dense? Fact #4:

    Cancer turns up five times more often in women with extremely dense breasts than those with the most fatty tissue.

     
  • Are You Dense? Fact #5:

    While a mammogram detects 98% of cancers in women with fatty breasts, it finds only 48% in women with the densest breasts.

     
  • Are You Dense? Fact #6:

    A woman at average risk and a woman at high risk have an EQUAL chance of having their cancer masked by mammogram.

     
  • Are You Dense? Fact #7:

    Women with dense breasts who had breast cancer have a four times higher risk of recurrence than women with less-dense breasts.

     
  • Are You Dense? Fact #8:

    A substantial proportion of Breast Cancer can be attributed to high breast density alone.

     
  • Are You Dense? Fact #9:

    There are too many women who are unaware of their breast density, believe their “Happy Gram” when it reports no significant findings and are at risk of receiving a later stage cancer diagnosis. 

     
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