Navigation Links
Denser Breasts Raise Odds of Second Breast Cancer, Study Finds
Date:10/7/2010

By Kathleen Doheny
HealthDay Reporter

THURSDAY, Oct. 7 (HealthDay News) -- Women with an early form of breast cancer who have dense breasts may be at higher risk of getting a second breast cancer, particularly in the opposite breast, a new study indicates.

"The risk appears to be stronger for the opposite breast than for the breast that originally had the cancer," said Laurel A. Habel, a research scientist at Kaiser Permanente's Division of Research in Oakland, Calif.

Habel is lead author of the study published Oct. 7 in Cancer Epidemiology, Biomarkers & Prevention.

Women with the most dense breasts, as seen on mammograms, "were at about twice the risk of a second cancer, and the risk was closer to threefold for the opposite breast," Habel said.

Dense breast tissue is made up mostly of ductal structures and connective tissue, while non-dense breast tissue is mostly fatty, Habel said. On a mammogram, dense tissue appears white; non-dense looks dark gray.

Experts can't say for sure why density is linked with cancer risk, Habel said, but these findings echo the results of previous studies. In 2004, Habel's team reported a link between denser breasts and a higher risk of second breast cancers among women with ductal carcinoma in situ (DCIS), very early breast cancer, who were enrolled in a clinical trial.

Other research, published in 2007, found that DCIS patients with higher breast density were at increased risk of a second cancer in the opposite breast.

In the most recent study, conducted from 1990 to 1997, Habel's team followed 935 women diagnosed with early-stage breast cancer (DCIS) who underwent breast-conserving surgery. The follow-up was for a median of more than eight years. During that time, 164 (18 percent), had a second cancer in the same breast, and 59 (6 percent) had a new cancer in the opposite breast.

Habel said she can't explain the higher risk for the opposite breast. "What we do see is, the amount of density is quite similar in both breasts," she said.

Previous research has established breast density, which is influenced by genetic factors, as a strong risk factor for getting breast cancer, although Habel said she suspects many women are still not aware of it as a risk factor.

Women aren't routinely told if their mammogram reveals dense breasts, although doctors may mention extreme density, she said.

"It's good to know if they're dense," said Dr. Joanne Mortimer, director of women's cancer programs at the City of Hope Comprehensive Cancer Center in Duarte, Calif.. A women can ask her doctor, she said.

Breast density declines with age, and obese women have denser breasts than leaner women, Mortimer said.

The new study, she said, confirms earlier research. The practical aspect may be to help women make treatment decisions, she said.

For instance, some women diagnosed with breast cancer choose to undergo a mastectomy on the unaffected breast as a preventive measure. "People do it for emotional reasons," she said.

The new research suggests that breast density may be a factor to consider when debating treatment options, "but not as a single factor," Mortimer said. More study is needed on the density-cancer link before it's relied on strongly in decision-making, she said.

More information

To learn more about breast cancer recurrence, visit Johns Hopkins Medicine.

SOURCES: Joanne Mortimer, M.D., medical oncologist and director, women's cancer programs, City of Hope Comprehensive Cancer Center, Duarte, Calif.; Laurel Habel, Ph.D., research scientist, Kaiser Permanente Division of Research, Oakland, Calif.; October 2010 Cancer Epidemiology Biomarkers & Prevention


'/>"/>
Copyright©2010 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Jenny McCarthy - Actress, Activist, and Model - Dedicates bforacure's ‘breasts are beautiful' to Help Raise Money for Breast Cancer Charities
2. Food allergies raise risk of asthma attacks
3. Low-Carb Diets Heavy on Meat May Raise Health Risks
4. Chemicals in Rugs, Cookware May Be Linked to Raised Cholesterol in Teens
5. Children raised by gay couples show good progress through school
6. Herpes Drugs Wont Raise Birth Defect Risk, Study Finds
7. Alcohol May Raise Risk for Certain Breast Cancers
8. Prenatal Pesticide Exposure May Raise Risk of Attention Issues in Kids
9. Web Connection Raises Chances of Romance
10. Wider Waist May Raise Death Risk Later in Life
11. Epilepsy Drugs Dont Raise Suicide Risk, Study Shows
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Denser Breasts Raise Odds of Second Breast Cancer, Study Finds
(Date:12/2/2016)... ... December 02, 2016 , ... With the number of pain management programs ... patients must find the one that works for them. When an inventor from Suisun ... that worked and decided to share it with others. , He developed a prototype ...
(Date:12/2/2016)... ... ... More than half of American teens report losing their virginity before they ... child about sex related topics, less than 60 percent spoke about deeper themes like ... launch of its second edition of the “Sexual Wellness” campaign, aiming to address the ...
(Date:12/2/2016)... ... December 02, 2016 , ... ... Regency Waikiki Beach Resort and Spa in Honolulu, offering local frontline clinicians the ... pain management. , The demand for supplemental training related to pain management ...
(Date:12/2/2016)... ... 02, 2016 , ... Rijuven Corp launches rejiva ( http://www.rejiva.com ), a unique ... other wearable health technology on the market can deliver all that rejiva can. , ... insights about their health than the usual heart rate and steps taken”, adds Evens ...
(Date:12/2/2016)... ... December 02, 2016 , ... ... today that it has raised $6.0 million in an initial round of funding. ... conviction that patients and their caregivers can receive far better care through the ...
Breaking Medicine News(10 mins):
(Date:12/2/2016)... , December 2, 2016 On ... Committee honored excellence in research, development and innovation in ... gala dinner was held in the presence of Sergey ... Russian Federation , Natalia Sanina, First ... Mikhail Murashko , Head of Roszdravnadzor, National Service of ...
(Date:12/2/2016)... British Columbia , December 2, 2016 bioLytical ... den INSTI HIV-Selbsttest, bei den Mitgliedern des Apothekenbundes von Kenia eingeführt. ... ... INSTI HIV Self Test! (PRNewsFoto/bioLytical Laboratories) ...      (Photo: http://photos.prnewswire.com/prnh/20161201/444905 ) ...
(Date:12/2/2016)... -- Lianluo Smart Limited (Nasdaq: LLIT ... markets and sells medical devices and wearable sleep ... and international markets, recently attended the 2016 Guangdong ... Forum, co-hosted by the Institute of Interventional Cardiology ... Provincial People,s Hospital and Cardiology Department of Guangdong ...
Breaking Medicine Technology: