Search the web
Yahoo! News Sign In
New User? Sign Up
Click to learn more...
Welcome, Guest Personalize News Home Page   -   Sign In
Yahoo! News   Mon, Feb 16, 2004
Search    for     Advanced
News Home
Top Stories
U.S. National
   Weight Loss
   Sexual Health
Most Popular
Oddly Enough
News Photos
Most Popular
Full Coverage

Full Coverage
More about
Breast Cancer
Related News Stories
Study Links Breast Cancer to Antibiotics Use at Washington Post (Feb 16, 2004)
Breast Cancer Risk Tied to Antibiotic Use HealthDay via Yahoo! News (Feb 16, 2004)
Antibiotic Use Linked with Breast Cancer Risk Reuters via Yahoo! News (Feb 16, 2004)
Opinion & Editorials
The Race Veers Off Course at Hartford Courant (registration req'd) (Jan 28, 2004)
Send for the screen saver at The Guardian (UK). (Jan 15, 2004)
Feature Articles
A Son Crusades for Mom at LA Times (registration req'd) (Feb 11, 2004)
One Battle at a Time Newsweek (Jan 18, 2004)
Related Web Sites
Breast Cancer Decision Guide
Susan G. Komen Breast Cancer Foundation
Yahoo! Health: Breast Cancer

News Resources
ACS News Today
News Alerts
Journal of the American Medical Association
Daily Emails
Free News Alerts
  News via RSS

Health - Reuters
Antibiotic Use Linked with Breast Cancer Risk
2 hours, 34 minutes ago
Add Health - Reuters to My Yahoo!

NEW YORK (Reuters Health) - The use of antibiotics appears to be associated with an increased risk of breast cancer and fatal breast cancer, according to the results of a new study reported in this week's issue of the Journal of the American Medical Association (news - web sites).

 In Yahoo! Health
Chronic Heartburn Chronic Heartburn
Need Relief?

 More from Yahoo! Health:
   Check Your Symptoms  
   How Is It Diagnosed?  
   Available Treatments  

However, the investigators add that although a relationship has been found, their findings do not prove that antibiotic use is the cause of breast cancer in these women and they note that other factors may be involved.

Earlier reports have suggested a link between antibiotics and increased cancer risk, lead author Dr. Christine M. Velicer of the University of Washington, Seattle and colleagues note.

The effects of these drugs on the microorganisms normally found in the intestines and the way estrogen is processed, as well as their effects on the immune system and on inflammation, have been suggested as possible ways antibiotics may influence the development of cancer.

To further investigate a possible relationship, Velicer's group evaluated data collected for 2266 women with primary, invasive breast cancer between 1993 and 2001, and 7953 randomly selected women without breast cancer who were enrolled in the same health plan.

"We found that increasing cumulative days of antibiotic use and increasing cumulative number of antibiotic prescriptions were associated with increased risk of incident breast cancer, after controlling for age and length of enrollment," they report.

When compared with women with no history of antibiotic use, women with cumulative antibiotic use for 1 to 500 days had a 2.5-fold increase risk of breast cancer. "Increasing cumulative days of antibiotic use was also associated with death due to breast cancer, controlling for age, length of enrollment, and ever use of postmenopausal hormones," they write.

The investigators stress, however, that "it cannot be determined from this study whether antibiotic use is causally related to breast cancer, or whether indication for use, overall weakened immune function, or other factors are pertinent underlying exposures."

"This observation is potentially worrisome in that antibiotic exposure is common and sometimes nonessential," Drs. Roberta B. Ness and Jane A. Cauley of the University of Pittsburgh comment in an accompanying editorial. "Thus, if real, the risk of breast cancer attributable to the use of antibiotics could be large and partially preventable."

The study provides more questions than answers, they add.

Both the authors and editorialists agree that the clinical implications of the study are unclear and than more studies are needed to explore the relationship between antibiotic use and cancer risk.

SOURCE: Journal of the American Medical Association, February 18, 2004.

Mail to Friend  Email Story
Message Boards   Post/Read Msgs (20)
Printer Version   Print Story
Ratings: Would you recommend this story?
Not at all 1 - 2 - 3 - 4 - 5 Highly

Next Story: Physical Fitness May Protect Aging Brain (Reuters)

More Health Stories
Fitness Can Improve Thinking Among Aging   (AP)
Your Heart's Health Is in Your Hands  (HealthDay)
Survival Improving for Recurrent Breast Cancer  (American Cancer Society)
Study links heavy antibiotic use, breast cancer  (AFP)
Antioxidants Appear to Protect Against Diabetes  (Reuters)

Online Graduate Degrees in Health
Online Graduate Degrees in Health
Browse All Health Programs
from Yahoo! Education

Copyright 2004 Reuters Limited. All rights reserved. Republication or redistribution of Reuters content is expressly prohibited without the prior written consent of Reuters. Reuters shall not be liable for any errors or delays in the content, or for any actions taken in reliance thereon.
Copyright 2004 Yahoo! Inc. All rights reserved.
Questions or Comments
Privacy Policy -Terms of Service - Copyright Policy - Ad Feedback

[ Scanned by JARING E-Mail Virus Scanner ( ) ]

[ Scanned by JARING E-Mail Virus Scanner ( ) ]