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ASTRO and SSO issue consensus guideline on margins for breast-conserving surgery with WBI
Date:2/10/2014

ance of pleomorphic LCIS at the margin is uncertain; 7) young age (≤40 years) is associated with both an increased risk of IBTR after breast-conserving therapy (BCT) and an increased risk of local relapse on the chest wall after mastectomy and is more frequently associated with adverse biologic and pathologic features. There is no evidence that increased margin width nullifies the increased risk of IBTR in young patients; and 8) an extensive intraductal component (EIC) identifies patients who may have a large residual DCIS burden after lumpectomy. There is no evidence of an association between increased risk of IBTR and EIC when margins are negative.

"Our hope is that this guideline will ultimately lead to significant reductions in the high re-excision rate for women with early-stage breast cancer undergoing breast-conserving surgery. Based on the consensus panel's extensive review of the literature, the vast majority of re-excisions are unnecessary because disease control in the breast is excellent for women with early-stage disease when radiation and hormonal therapy and/or chemotherapy are added to a women's treatment plan," said Dr. Moran.

"A significant portion of breast cancer surgeries in the United States are performed by surgical oncologists, and the definition of an adequate margin has been a major controversy. Therefore, it was only natural that we decided to create a definitive guideline that helps to minimize unnecessary surgery while maintaining the excellent outcomes seen with lumpectomy and radiation therapy," said Dr. Morrow. "We are proud to provide this pivotal document to the oncology community, which will improve the lives and treatment of patients touched by this disease."

In addition to Drs. Moran and Morrow, members of the MCP and authors of the Society of Surgical OncologyAmerican Society for Radiation Oncology Consensus Guideline on Margins for Breast-Conserving Surgery With Whole-Breast Irradiation in S
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Contact: Michelle Kirkwood
press@astro.org
703-286-1600
American Society for Radiation Oncology
Source:Eurekalert

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