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Appropriateness of breast-conserving treatment of breast carcinoma in women with germline mutations in BRCA1 or BRCA2
A clinic-based series
Article first published online: 22 NOV 2004
Copyright © 2004 American Cancer Society
Volume 103, Issue 1, pages 44–51, 1 January 2005
How to Cite
Robson, M., Svahn, T., McCormick, B., Borgen, P., A. Hudis, C., Norton, L. and Offit, K. (2005), Appropriateness of breast-conserving treatment of breast carcinoma in women with germline mutations in BRCA1 or BRCA2. Cancer, 103: 44–51. doi: 10.1002/cncr.20728
- Issue published online: 17 DEC 2004
- Article first published online: 22 NOV 2004
- Manuscript Accepted: 14 SEP 2004
- Manuscript Revised: 9 SEP 2004
- Manuscript Received: 13 APR 2004
- Department of Defense Award. Grant Number: DAMD17-01-1-0325
- breast carcinoma;
- radiation therapy;
- genetic predisposition
Although BRCA1 and BRCA2 were identified in 1994 and 1995, respectively, to the authors' knowledge the optimal management of women with BRCA-associated breast carcinoma remains incompletely defined. The current study evaluates the appropriateness of breast-conserving therapy (BCT) in women with BRCA mutations.
Between May 1992 and October 2003, 87 female participants in genetic testing protocols were identified who 1) were found to have deleterious germline BRCA mutations and 2) reported a history of invasive breast carcinoma that was treated with wide local excision and radiation therapy. Clinical records were reviewed and follow-up was updated.
The 87 subjects underwent BCT for 95 invasive breast tumors (8 women received BCT for metachronous bilateral tumors). In all 95 treated breasts, the 5-year and 10-year probabilities of metachronous ipsilateral breast carcinoma (MIBC) were 11.2% and 13.6%, respectively. Among the 87 subjects, the 5-year and 10-year probabilities of metachronous contralateral breast carcinoma (CBC) after treatment of the index tumor were 11.9% and 37.6%. No clinical factors were identified that were associated with either MIBC or CBC, including the use of tamoxifen or chemotherapy.
Women with BRCA-associated breast carcinoma who undergo BCT appear to have risks of MIBC that are similar to those reported for young women without known mutations. The indications for unilateral mastectomy in this group of women should be the same as those for women with nonhereditary carcinoma. However, significant risks of CBC and possibly late MIBC may prompt the serious consideration of bilateral mastectomy as a preventive measure. Cancer 2005. © 2004 American Cancer Society.