Featured Research

from universities, journals, and other organizations

Extended outcomes of adjuvant accelerated partial breast irradiation show excellent tumor control, breast cosmesis, minimal late toxicity

Date:
January 29, 2014
Source:
American Society for Radiation Oncology (ASTRO)
Summary:
Long-term (five-year) outcomes of breast cancer patients receiving adjuvant accelerated partial breast irradiation (APBI) after breast-conserving surgery show excellent tumor control and breast cosmesis (cosmetic outcomes) with minimal late toxicity, according to a study.

Long-term (five-year) outcomes of breast cancer patients receiving adjuvant accelerated partial breast irradiation (APBI) after breast-conserving surgery show excellent tumor control and breast cosmesis (cosmetic outcomes) with minimal late toxicity, according to a study published in the February 1, 2014 print edition of the International Journal of Radiation Oncology ● Biology ● Physics (Red Journal), the official scientific journal of the American Society for Radiation Oncology (ASTRO).

Related Articles


APBI delivers highly conformal radiation therapy, during a period of one to two weeks, to the site where the cancer was removed. APBI has seen a 10-fold increase in use from 2002 to 2007 and is currently the focus of several ongoing phase III trials.

The University of Pittsburgh Cancer Institute study examines the long-term outcomes, tumor control and breast cosmesis of a cohort of early-stage and ductal carcinoma in situ (DCIS) breast cancer patients who received a five-day treatment of APBI at the University of Pittsburgh from 2002 to 2007.

The study is a retrospective review of 157 patients with localized breast cancer treated with adjuvant MammoSite, single-lumen balloon-based brachytherapy after breast-conserving surgery from June 1, 2002 to December 31, 2007. For all patients, at least five years had passed since receiving brachytherapy. Patients were all age 40 or older, with 88.5 percent over age 50, and had stage T1-T2 breast cancer, with 82.4 percent in stage T1A-C, 12.2 percent with DCIS, 4.7 percent in stage T2 and 0.7 percent in stage T1mic. Patients were also categorized by demographics and tumor characteristics into suitable, cautionary and unsuitable groups based on recommendations from ASTRO's APBI Consensus Statement.

APBI was delivered to a median dose of 34 Gy in 10 fractions over a five-day period. In addition, 89 percent of patients received additional adjuvant systemic therapy, with 66.9 percent receiving hormonal therapy, 13.4 percent chemotherapy and 8.3 percent chemotherapy with hormonal therapy. Follow-up was conducted every three to four months for the first two years post-treatment, and every six months thereafter at the discretion of the patient's breast surgeon and radiation oncologist. Baseline mammograms were performed three to six months after treatment, and annually thereafter. In addition, cosmetic outcomes were documented via photography at each visit, and toxicity was assessed during the final follow-up visit.

At a median follow-up of 5.5 years post-treatment, the five-year and seven-year actuarial ipsilateral breast control were 98 percent/98 percent, the lymph nodal control were 99 percent/98 percent and the distant control were 99 percent/99 percent. The breast cancer specific survival was 100 percent at five years and 99 percent at seven years. The overall survival was 89 percent at five years and 86 percent at seven years. There were no significant differences in tumor recurrence or survival rates in the appropriateness subgroups based on ASTRO's consensus statement. Good to excellent breast cosmesis was reported in 93.4 percent of patients. Overall toxicity rates were low, and the most common toxicity was telangiectasia, small, dilated blood vessels near the surface of the skin, which was reported in 27 percent of study participants. The study correlated telangiectasia development and the maximum radiation dose to the skin. The study institution practice is to keep maximum skin dose ≤ 100 percent and at maximum ≤ 125 percent to limit the risk of telangiectasia.

"These results may encourage women to choose this convenient five-day treatment and also help radiation oncologists use techniques that can reduce skin dose further, thus further reducing the long-term effects of partial breast radiation therapy on skin changes and breast cosmesis," said Sushil Beriwal, MD, a co-author of the study and a radiation oncologist at the University of Pittsburgh Cancer Center. "The promising outcomes seen across subgroups, as defined by prior consensus definitions for appropriate patient selection, suggest that the current metrics for selecting patients for APBI may need to be redefined such that more women may be candidates for less radiation over a shorter time via APBI."


Story Source:

The above story is based on materials provided by American Society for Radiation Oncology (ASTRO). Note: Materials may be edited for content and length.


Journal Reference:

  1. John A. Vargo, Vivek Verma, Hayeon Kim, Ronny Kalash, Dwight E. Heron, Ronald Johnson, Sushil Beriwal. Extended (5-year) Outcomes of Accelerated Partial Breast Irradiation Using MammoSite Balloon Brachytherapy: Patterns of Failure, Patient Selection, and Dosimetric Correlates for Late Toxicity. International Journal of Radiation Oncology*Biology*Physics, 2014; 88 (2): 285 DOI: 10.1016/j.ijrobp.2013.05.039

Cite This Page:

American Society for Radiation Oncology (ASTRO). "Extended outcomes of adjuvant accelerated partial breast irradiation show excellent tumor control, breast cosmesis, minimal late toxicity." ScienceDaily. ScienceDaily, 29 January 2014. <www.sciencedaily.com/releases/2014/01/140129164650.htm>.
American Society for Radiation Oncology (ASTRO). (2014, January 29). Extended outcomes of adjuvant accelerated partial breast irradiation show excellent tumor control, breast cosmesis, minimal late toxicity. ScienceDaily. Retrieved December 18, 2014 from www.sciencedaily.com/releases/2014/01/140129164650.htm
American Society for Radiation Oncology (ASTRO). "Extended outcomes of adjuvant accelerated partial breast irradiation show excellent tumor control, breast cosmesis, minimal late toxicity." ScienceDaily. www.sciencedaily.com/releases/2014/01/140129164650.htm (accessed December 18, 2014).

Share This


More From ScienceDaily



More Health & Medicine News

Thursday, December 18, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Kids Die While Under Protective Services

Kids Die While Under Protective Services

AP (Dec. 18, 2014) As part of a six-month investigation of child maltreatment deaths, the AP found that hundreds of deaths from horrific abuse and neglect could have been prevented. AP's Haven Daley reports. (Dec. 18) Video provided by AP
Powered by NewsLook.com
UN: Up to One Million Facing Hunger in Ebola-Hit Countries

UN: Up to One Million Facing Hunger in Ebola-Hit Countries

AFP (Dec. 17, 2014) Border closures, quarantines and crop losses in West African nations battling the Ebola virus could lead to as many as one million people going hungry, UN food agencies said on Wednesday. Duration: 00:52 Video provided by AFP
Powered by NewsLook.com
When You Lose Weight, This Is Where The Fat Goes

When You Lose Weight, This Is Where The Fat Goes

Newsy (Dec. 17, 2014) Can fat disappear into thin air? New research finds that during weight loss, over 80 percent of a person's fat molecules escape through the lungs. Video provided by Newsy
Powered by NewsLook.com
Why Your Boss Should Let You Sleep In

Why Your Boss Should Let You Sleep In

Newsy (Dec. 17, 2014) According to research out of the University of Pennsylvania, waking up for work is the biggest factor that causes Americans to lose sleep. Video provided by Newsy
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