HOME >> MEDICINE >> NEWS
Oral contraceptives increase risk for breast cancer in some women, meta-analysis finds

ROCHESTER, Minn. -- A meta-analysis published in the October issue of Mayo Clinic Proceedings indicts oral contraceptives as putting premenopausal women at significantly increased risk for breast cancer, especially women who use them prior to having a child.

The meta-analysis builds on many studies with similar findings. But even as the findings stack up, many women are unaware of the risks posed by oral contraceptive use prior to pregnancy, says lead study author Chris Kahlenborn, M.D., of Altoona Hospital in Altoona, Pa.

Dr. Kahlenborn says the discrepancy between risk and patient awareness prompted the meta-analysis, which involved extracting data from 34 studies on whether oral contraceptive (OC) use is associated with premenopausal breast cancer. Included in the studies were women who were premenopausal or younger than 50 and who had been, in most cases, diagnosed with breast cancer during or after 1980.

"As I studied the medical literature, I noticed that a trend appeared," says Dr. Kahlenborn. "Namely, OC use prior to first-term pregnancy seemed to consistently increase the risk of premenopausal breast cancer. Although the trend was apparent, premenopausal women have continued to hear that OCs are basically safe."

Rather, patients should know that sustained oral contraceptive use prior to pregnancy increases a premenopausal woman's risk of developing breast cancer, saysDr. Kahlenborn. He says physicians should better inform their patients of the risks associated with oral contraceptives and calls it a "clear-cut informed consent issue."

The study noted that 21 out of 23 retrospective studies have shown an increased risk of breast cancer in women who took oral contraceptives prior to pregnancy. It also showed that those women experienced an increased risk of 44 percent.

What's more, in 2005, the World Health Organization officially classified oral contraceptives as a class one carcinogen, the study
'"/>

Contact: John Murphy
newsbureau@mayo.edu
507-284-5005
Mayo Clinic
30-Oct-2006


Page: 1 2

Related medicine news :

1. Study demonstrates safety of oral contraceptives in women with lupus
2. VCU study: Low-dose oral contraceptives may increase risk for heart attack or stroke
3. Traditional Chinese exercises may increase efficacy of flu vaccine
4. Smoking may strongly increase long-term risk of eye disease
5. Diets high in choline may increase risk for colorectal polyps
6. Chemotherapy with bevacizumab increases risk of blood clots in arteries
7. Low hospital staff levels increase infection rates
8. Reduced greenhouse gas emissions required to avoid dangerous increases in heat stress
9. How to market diet pills: Prescription and over-the-counter pills may increase unhealthy behavior
10. Study outlines how stroke, head injury can increase risk of Alzheimers disease
11. Antipsychotic drugs increase risk of death in older people with dementia

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:9/22/2017)... ... September 22, 2017 , ... "Success Files," a short- ... Alzheimer’s. Alzheimer’s is a disease estimated to affect the lives of more than ... the Alzheimer’s Association, a leading voice in the fight for cure and research ...
(Date:9/22/2017)... ... September 22, 2017 , ... ... and create life. Although frozen embryos have a slight statistical advantage for live ... freezing is a wonderful opportunity for women undergoing medical treatment or who are ...
(Date:9/21/2017)... ... September 21, 2017 , ... SABRE is raising awareness about personal ... to the end of November. , The Chicago, Illinois, based self-defense brand has been ... them about the ease of taking their personal safety into their own hands. , ...
(Date:9/21/2017)... ... September 21, 2017 , ... Bill Howe Plumbing’s mission is to create an ... to the community. For over 37 years, they have operated with their mission at ... in San Diego. They were chosen as the Best San Diego plumber in ...
(Date:9/21/2017)... ... September 21, 2017 , ... Japanese Zen artist couple, Fumie and Kentaro ... 7th and 8th October at Miranda Kuo Gallery on Lower East Side, NYC. This ... Zen Kodo mat. Wanderlust , one of the largest US yoga online media ...
Breaking Medicine News(10 mins):
(Date:9/6/2017)...  Medical professionals are expected to continuously ... their patients. Medical simulations offer clinicians the ... Simulation provides a safe method for teaching ... refine techniques and build confidence, without putting ... such as augmented reality, will now provide ...
(Date:9/5/2017)... 5, 2017  Xyntek Inc. has announced another milestone in their continued growth ... to meet the growing demands of customer engagements regionally.  ... Xyntek's new Midwest office is located at 318 West Adams Street, Suite ... Xyntek's ... ...
(Date:9/1/2017)... , Sept. 1, 2017  Explorers Like Us ( https://explorerslikeus.com/ ... greatest aural experiences — and deliver these experiences as part ... help people feel and heal better. ... While nothing beats a walk, jog ... your mind, Life Environments™ is the next best thing when ...
Breaking Medicine Technology:
Cached News: