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:5/27/2016)... (PRWEB) , ... May 27, 2016 , ... ... in scholarships to students studying complementary medicine. Allison Outerbridge is this year’s ... her award on May 18 at the university’s Student Leadership Awards ceremony. , ...
(Date:5/26/2016)... Hampshire (PRWEB) , ... May 26, 2016 , ... ... care products, has been honored with a 2016 When Work Works Award for its ... award, part of the national When Work Works project administered by the Families and ...
(Date:5/26/2016)... ... 26, 2016 , ... Connor Sports, through its Connor Cares initiative, ... Tamika Catchings Legacy Tour that will commemorate the Indiana Fever legend’s hall-of-fame ... in all forms and levels of the game, Connor Sports has committed to a ...
(Date:5/26/2016)... ... ... There are nearly 14.5 million people living with and beyond cancer in ... 5, 2016, communities around the world will gather to recognize these cancer survivors as ... Day® is an annual worldwide Celebration of Life that is held on the first ...
(Date:5/26/2016)... ... May 26, 2016 , ... An April Gallup survey found rising health ... employees of Sun Health Senior Living (SHSL) may not share those same ... and prescription copays for the year, while holding the line on increasing their contributions, ...
Breaking Medicine News(10 mins):
(Date:5/27/2016)... 2016 LabStyle Innovations Corp . ... Tool, today announced that the Company,s Chief Financial Officer, ... being held June 1-2 in New York, NY ... 7-9 in Los Angeles, CA. ... and operational milestones, including the U.S. FDA Clearance and commercial ...
(Date:5/27/2016)... , May 27, 2016 Amarantus BioScience ... on developing products for Regenerative Medicine, Neurology and Orphan Diseases, today ... be presenting at two upcoming investor conferences: SeeThru ... Third Avenue, New York City , NY ... Marcum MicroCap Conference   Where: Grand Hyatt ...
(Date:5/26/2016)... -- TARE (Transarterial Radio-embolization) Using Yttrium-90 ... Overall Decreased Use of Hospital Resource ... healthcare company, has today announced the publication of ... ISPOR (International Society for Pharmacoeconomics and Outcomes Research), ... yttrium-90 glass microspheres is associated with cost savings ...
Breaking Medicine Technology:
Cached News: