Navigation Links
Estrogen plus progestin use linked with increased breast cancer incidence and mortality
Date:3/29/2013

Estrogen plus progestin use is linked with increased breast cancer incidence. In addition, prognosis is similar for both users and nonusers of combined hormone therapy, suggesting that mortality from breast cancer may be higher for hormone therapy users as well, according to a study published March 29 in the Journal of the National Cancer Institute.

In the Women's Health Initiative (WHI) randomized trial, estrogen plus progestin was associated with an increase in both breast cancer incidence and mortality. However, most observational studies have linked estrogen plus progestin with more positive outcomes.

In order to determine the differences between the WHI trial and other observational studies, Rowan T. Chlebowski, M.D., Ph.D., Los Angeles Biomedical Research Institute (LA BioMed) lead researcher and colleagues, looked at postmenopausal women with no prior hysterectomy with negative mammograms within two years who were either users or non-users of estrogen and progestin combined therapy.

The researchers found that breast cancer incidence was higher in estrogen plus progestin users than incidence in nonusers. Women who started hormone therapy closer to menopause had a higher breast cancer risk with a weakening influence as the time from menopause increased.

"Because survival after breast cancer diagnosis did not differ between estrogen plus progestin users and nonusers, the higher breast cancer incidence of those using estrogen plus progestin may lead to increased breast cancer mortality on a population basis," the authors write.

In an accompanying editorial, Catherine Schairer, Ph.D., and Louise A. Brinton, Ph.D., both of the National Cancer Institute, write that questions remain about whether the data analyzed from the WHI observational study resolves the differences in tumor prognosis and tumor characteristics when compared to the WHI randomized trial. They write that, "In general, tumors in estrogen plus progestin users in the WHI Observational Study were not significantly different from those in non-hormone users with regard to number of positive lymph nodes or tumor size, but were more likely to be well differentiated and positive for hormone receptors, findings which are similar to other observational studies." This, however, did not translate into a survival benefit. They recommend further analyses in this and other datasets of currency and duration of hormone use in relationship to tumor development to fully resolve the issue of tumor characteristics associated with estrogen plus progestin therapy.


'/>"/>

Contact: Zachary Rathner
Zachary.Rathner@oup.com
919-677-2697
Journal of the National Cancer Institute
Source:Eurekalert

Related medicine news :

1. Estrogen helps keep joint pain at bay after hysterectomy
2. Maturitas publishes clinical guide on low-dose vaginal estrogens for vaginal atrophy
3. Genetic markers for testosterone and estrogen level regulation identified
4. BUSM researchers identify genetic markers for testosterone, estrogen level regulation
5. Early-onset baldness in African-American men may be linked to prostate cancer
6. Cedars-Sinai study: Obesity may be linked to microorganisms living in the gut
7. Higher soy intake prior to lung cancer diagnosis linked to longer survival in women
8. Certain Lifestyle Factors Linked to Arthritis in Study Patients
9. Desire to Succeed Linked to Better Grades in College
10. Smokefree workplaces linked to smokefree homes in India
11. Energy Drinks Linked to Changes in Heart Rhythm
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/29/2016)... , ... April 29, 2016 , ... In an ... and divorcee, shares her enthusiasm for Botox and lip injections, which she underwent in ... youth oriented Coachella Valley Music and Arts Festival. The article explains that Ms. Mirmelli’s ...
(Date:4/29/2016)... ... 29, 2016 , ... Shamangelic Healing, Sedona Arizona's Premier ... Alpha BRAIN and New Mood Daily-Stress Formula for brain optimization and wellness to ... the store is just one more way Shamangelic Healing supports people’s quest for ...
(Date:4/29/2016)... (PRWEB) , ... April 29, 2016 , ... ... the heart of our nation’s productivity, stability, even security. Most importantly, employees are ... organizations. , Then why are American workers so unhappy? , Just under half ...
(Date:4/29/2016)... ... , ... Conditions were ideal for Global Lyme Alliance’s (GLA) 2nd annual “Bite ... a light breeze and temperatures in the 60s. Over 400 runners, walkers and volunteers ... and 1-mile walk were held to increase awareness about Lyme disease and to ...
(Date:4/29/2016)... Texas (PRWEB) , ... April 29, 2016 , ... Spine ... neck pain, is proud to announce one of their physicians has been invited to ... Family Physicians (Texas ACOFP) Family Practice Review conference on April 30, 2016. , ...
Breaking Medicine News(10 mins):
(Date:4/29/2016)... -- Glycotope GmbH, a clinical-stage immuno-oncology company ... of Dr. Alfredo Zurlo as Chief Medical ... many years clinical experience and a proven track record ... was at Mologen AG where he was Chief Medical ... Zurlo held various positions at F Hoffmann La Roche ...
(Date:4/28/2016)...  Marking its one year anniversary since launching ... risk test, Color Genomics announced a ... impact the most common hereditary cancers affecting both ... analyzes hereditary cancer risks for breast, colorectal, melanoma, ... Color Test is physician ordered and includes genetic ...
(Date:4/28/2016)... 28, 2016 Dr. Vivek Ahuja ... and Ste phen Schmidt ... leading provider of cloud-based software solutions for life sciences, today announced ... bring a wealth of insight to a growing business.  This will ... George Phillips joined ArisGlobal in the position of ...
Breaking Medicine Technology: