Breast Cancer

Study : Aerobic exercise lowers estrogen levels in premenopausal women at high risk for breast cancer

Relevance: Medium

Strength of Science: Medium

Research Timeline: Human Research

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Most relevant for: High risk women with a BRCA mutation or a close relative with a BRCA mutation

Many treatments that lower estrogen levels also reduce breast cancer risk. Unfortunately, these treatments are also associated with negative side effects. A recent study looked at the effect of regular aerobic exercise on the estrogen levels of women who are at high risk for breast cancer. (11/14/2015)

Study : Breastfeeding may reduce hormone receptor negative breast cancer risk

Relevance: Medium

Strength of Science: Medium-Low

Research Timeline: Human Research

Most relevant for: Women who are pregnant or have just given birth and are deciding about breastfeeding

Previous studies have shown that women who breastfeed have a reduced breast cancer risk. This study examines this association in the different breast cancer subtypes (ER, PR, HER2 negative/positive) and finds that breastfeeding is associated with a reduced risk of ER-/PR- breast cancer. (11/16/2015)

Article : What “The Truth About Cancer” got wrong about BRCA mutations and cancer

Relevance: Low

Quality of Writing: Low

Most relevant for: Because this video is full of medical misinformation, it is not relevant for anyone making healthcare decisions

A website called thetruthaboutcancer.com, created a 9-part docu-series titled “The Truth About Cancer: A Global Quest” (TACGQ). The video states that Angelina Jolie’s decision to remove her breasts was one made out of fear; one commentator states that her decision was “barbaric." This video contains a lot of dangerous misinformation about BRCA mutations and inherited cancer. FORCE XRAYS provides the following point-by-point analysis on "The Truth About Cancer." (11/10/2015)

Study : Impact of familial breast cancer risk on young girls

Relevance: Medium-High

Strength of Science: Medium

Most relevant for: Young women and girls from high-risk breast cancer families

Does growing up in a family that is at high risk for breast cancer affect young girls? Recent research found girls from families with BRCA mutations and/or a strong family history of cancer to be as well adjusted as peers of the same age. The one difference was that girls from families facing breast cancer risk had more stress related to breast cancer than their peers. While these findings are reassuring, parents know their children best, and they should ask for help if they believe their daughters are not coping well. (11/03/2015)

Study : New research may lead to a blood test that detects breast cancer recurrence earlier

Relevance: Medium

Strength of Science: Medium

Research Timeline: Human Research

Most relevant for: People diagnosed with early stage breast cancer

Recent headlines announced a blood test that can potentially predict which breast cancer survivors are at risk of recurrence. This particular blood test, one of many being developed, is sometimes called a “liquid biopsy.” This early research focuses on a technique that is promising, but not yet available to breast cancer survivors. (10/12/15)

Note: THIS INFORMATION HAS BEEN UPDATED on 11/07/19 with newly-published data. See our updated article: A new blood test may help predict early-stage breast cancer patients at highest risk for recurrence.

Study : Are more men with breast cancer opting for prophylactic mastectomy?

Relevance: Medium

Strength of Science: Medium

Most relevant for: Men diagnosed with breast cancer

Recent headlines describe the rise in prophylactic double mastectomy for men with breast cancer. We looked at the research to see how many men are choosing this option and what it means for men with breast cancer. (10/6/15)

Study : BRCA mutations more common than expected in young black women with breast cancer

Relevance: High

Strength of Science: High

Research Timeline: Post Approval

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Most relevant for: Young black women who have been diagnosed with breast cancer

Most estimates of the percentage of breast cancer patients with mutations in BRCA are based on studies in White women. These researchers found that Black women diagnosed at a young age with breast cancer were twice as likely to have a BRCA mutation than previously reported based on studies in White women with breast cancer diagnosed in the same age categories. This study shows how important it is for all Black women diagnosed with breast cancer before age 50 to speak with their doctor about genetic counseling and testing. (9/29/15)

Study : Prenatal exposure to the pesticide DDT and breast cancer risk

Relevance: Medium-Low

Strength of Science: Medium-Low

Most relevant for: Women with prenatal exposure to DDT, women in countries where DDT is used

This study found an association between prenatal exposure to the pesticide DDT, and an increased risk of women developing breast cancer. While this study does not prove that DDT exposure directly causes breast cancer, it serves as a reminder that pregnant women's exposure to toxic environmental agents can affect their children's risk for disease later in life.

Study : All DCIS is not the same: Young women and African American women at higher risk after DCIS diagnosis

Relevance: Medium-High

Strength of Science: High

Most relevant for: Women diagnosed with DCIS

Diagnoses of ductal carcinoma in situ (DCIS), sometimes called stage 0 breast cancer, have increased in recent decades. Many people with DCIS wonder if they need aggressive treatment. A study looking at the survival of over 100,000 women found that breast cancer mortality after DCIS is low (3%), and identified groups of women who are at higher risk after DCIS. (9/8/15)

Study : Weight gain associated with breast cancer survivorship

Relevance: Medium-High

Strength of Science: Medium-High

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Most relevant for: Women diagnosed with early stage (1-3) breast cancer

Weight gain in breast cancer survivors can affect survival and quality-of-life. This study found that breast cancer survivors are more likely to gain weight than women of the same age who are at high risk, but have never been diagnosed with cancer. The study looked at which groups of survivors were more likely to gain weight. (8/24/15)