Affiliation of authors: R. G. Pearcey, A. W. Lees, Division of Radiation Oncology, Department of Oncology, University of Alberta, Edmonton, Alberta, Canada.
Correspondence to: Robert. G. Pearcey, M.A., M.B.B.S., F.R.C.R., F.R.C.P.C., Radiation Oncology, Cross Cancer Institute, 11560 University Ave., Edmonton, Alberta, Canada T6G 1Z2 (e-mail: robertpe{at}cancerboard.ab.ca).
We welcome the contribution that Whelan et al. (1) have made in this recently published article in the Journal. Their article establishes level one evidence to support the use of shortened fractionation schedules for a selected group of patients undergoing breast-conserving therapy for breast cancer. For this group of patients, a shorter course of radiation therapy will be more convenient and may, in fact, encourage some patients, who would previously have chosen mastectomy to avoid the need for 5 weeks of radiation therapy, to choose breast-conserving therapy. This is an especially important issue in countries like Canada with its population dispersed over a wide geographic area, where many patients live some distance from radiation oncology centers and are required to be away from home for the duration of their treatment. It also allows for a more cost-effective use of resources. However, the final statement of the paper"The shorter schedule also will permit more efficient use of resources, in that up to 50% more women can be treated with existing equipment and personnel"is not supported by the data in the paper and is also open to misinterpretation, especially by those not fully familiar with the radiation therapy process.
A 3-week treatment schedule allows a 50% savings in treatment machine resources for this particular group of patients only. The potential savings include machine time, staffing of the treatment units, and patient monitoring during treatment. It has no impact on resources needed for patient consultation, the planning of treatment, or follow-up after treatment.
Furthermore, although we agree that breast cancer is a diagnosis that accounts for 25%30% of all radiation therapy delivered, there are many indications for radiation therapy in breast cancer that this article does not address; for example, palliative radiation therapy, radiation therapy to the breast and regional lymph nodes, and postmastectomy radiation therapy. In our department, no more than 20% of all breast cancer treatments could now be treated with the fractionation schedule described in this article. This value represents 6% of all cancer patients treated by radiation therapy and only a 2% reduction in treatment machine workload.
REFERENCES
1 Whelan T, MacKenzie R, Julian J, Levine M, Shelley W, Grimard L, et al. Randomized trial of breast irradiation schedules after lumpectomy for women with lymph node-negative breast cancer. J Natl Cancer Inst 2002;94:114350.
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