Featured Research

from universities, journals, and other organizations

Chemotherapy is as effective before breast cancer surgery as after, study suggests

Date:
September 11, 2011
Source:
University of Texas M. D. Anderson Cancer Center
Summary:
Whether chemotherapy is given before or after breast-conserving therapy does not have an impact on long-term local-regional outcomes, suggesting treatment success is due more to biologic factors than chemotherapy timing, according to a new study.

Whether chemotherapy is given before or after breast-conserving therapy (BCT) does not have an impact on long-term local-regional outcomes, suggesting treatment success is due more to biologic factors than chemotherapy timing, according to a study by researchers at The University of Texas MD Anderson Cancer Center.

Presented September 8 at the 2011 Breast Cancer Symposium, the study also found that neoadjuvant chemotherapy (given before surgery), often shrinks breast cancer tumors, making them more likely to be treatable with BCT, or a lumpectomy to remove a portion of the breast followed by radiation.

"Even women who present with clinical Stage 2 or 3 breast cancer may have good results with BCT after chemotherapy and not need a mastectomy," said Elizabeth Ann Mittendorf, M.D., assistant professor in the Department of Surgical Oncology and lead author of the study. "The molecular characteristics of the tumor and other factors have an impact on treatment success, but not the order in which chemotherapy and surgery are given."

The retrospective study of almost 3,000 women treated for breast cancer at MD Anderson from 1987 to 2005 also confirmed several prior studies showing BCT offers high rates of cancer control for certain patients.

Approaches have similar outcomes

Of the patients surveyed, 78 percent had surgery before chemotherapy and 22 percent received chemotherapy first. Overall, women with more cancers that had more adverse prognostic factors tended to be treated with chemotherapy first.

Five and 10-year local-regional recurrence-free survival rates were excellent for both groups: 97 percent and 94 percent respectively for those who had surgery before chemotherapy, 93 percent and 90 percent for patients who received chemotherapy first.

Mittendorf said that if adverse features, such as stage and grade of the cancer, age of the patient and tumor hormone expression, were factored in, survival rates were essentially the same for both groups of women.

Neoadjuvant chemotherapy resulted in complete pathologic response in 20 percent of patients and lowered cancer stage in almost half of patients who had Stage 2 or 3 cancer before chemotherapy, increasing the likelihood that BCT may be effective for many women after chemotherapy.

Carrying results forward

"This study shows that women appropriately selected for BCT, even some women with Stage 3 breast cancer, can have excellent rates of local-regional control," Mittendorf said. "The most important thing is putting all the factors together to determine who can most benefit from this approach."

The group plans to extend the study into MD Anderson patients treated after 2005.

"Since 2005, treatment techniques have improved, including the ability to add targeted therapies to chemotherapy," she said. "In the future we will look at the effects of newer agents, and we anticipate the results will be even more favorable for women who received these treatments before surgery."

Other MD Anderson team members included Thomas Buchholz, M.D., Department of Radiation Oncology; Susan Tucker, Ph.D., Department of Bioinformatics and Computational Biology; Funda Meric-Bernstam, M.D., Henry Kuerer, M.D., Ph.D., Isabelle Bedrosian, M.D., Gildy Babiera M.D., Merrick Ross, M.D. and Kelly Hunt, M.D., Min Yi, M.D., Ph.D., Department of Surgical Oncology; Ana Gonzalez-Angulo, M.D. and Gabriel Hortobagyi M.D., Department of Breast Medical Oncology.


Story Source:

The above story is based on materials provided by University of Texas M. D. Anderson Cancer Center. Note: Materials may be edited for content and length.


Cite This Page:

University of Texas M. D. Anderson Cancer Center. "Chemotherapy is as effective before breast cancer surgery as after, study suggests." ScienceDaily. ScienceDaily, 11 September 2011. <www.sciencedaily.com/releases/2011/09/110908145328.htm>.
University of Texas M. D. Anderson Cancer Center. (2011, September 11). Chemotherapy is as effective before breast cancer surgery as after, study suggests. ScienceDaily. Retrieved October 21, 2014 from www.sciencedaily.com/releases/2011/09/110908145328.htm
University of Texas M. D. Anderson Cancer Center. "Chemotherapy is as effective before breast cancer surgery as after, study suggests." ScienceDaily. www.sciencedaily.com/releases/2011/09/110908145328.htm (accessed October 21, 2014).

Share This



More Health & Medicine News

Tuesday, October 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

How Nigeria Beat Its Ebola Outbreak

How Nigeria Beat Its Ebola Outbreak

Newsy (Oct. 20, 2014) The World Health Organization has declared Nigeria free of Ebola. Health experts credit a bit of luck and the government's initial response. Video provided by Newsy
Powered by NewsLook.com
Another Study Suggests Viagra Is Good For The Heart

Another Study Suggests Viagra Is Good For The Heart

Newsy (Oct. 20, 2014) An ingredient in erectile-dysfunction medications such as Viagra could improve heart function. Perhaps not surprising, given Viagra's history. Video provided by Newsy
Powered by NewsLook.com
Ebola Worries End for Dozens on U.S. Watch Lists

Ebola Worries End for Dozens on U.S. Watch Lists

Reuters - US Online Video (Oct. 20, 2014) Forty-three people who had contact with Thomas Eric Duncan, the first person diagnosed with Ebola in the U.S., were cleared overnight of twice-daily monitoring after 21 days of showing no symptoms. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
CDC Calls for New Ebola Safety Guidelines

CDC Calls for New Ebola Safety Guidelines

AP (Oct. 20, 2014) Centers for Disease Control and Prevention Director Dr. Tom Frieden laid out new guidelines for health care workers when dealing with the deadly Ebola virus including new precautions when taking off personal protective equipment. (Oct. 20) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins