Predictors for Clinical Outcomes After Accelerated Partial Breast Intensity-Modulated Radiotherapy
- Northwest Nazarene University, Nampa, ID (United States)
- Rocky Mountain Cancer Centers, Littleton, CO (United States)
- Rocky Mountain Cancer Centers, Aurora, CO (United States)
- Arapahoe Surgical Associates, Greenwood Village, CO (United States)
- Sally Jobe Diagnostic Breast Center, Greenwood Village, CO (United States)
- Rocky Mountain Cancer Centers, Rose Hospital, Denver, CO (United States)
Purpose: To correlate the treatment planning parameters with the clinical outcomes in patients treated with accelerated partial breast intensity-modulated radiotherapy. Methods and Materials: A total of 105 patients with Stage I breast cancer were treated between February 2004 and March 2007 in a Phase II prospective trial and had detailed information available on the planning target volume (PTV), ipsilateral breast volume (IBV), PTV/IBV ratio, lung volume, chest wall volume, surgery to radiotherapy interval, follow-up interval, breast pain, and cosmesis. The first 7 of these patients were treated to 34 Gy, and the remaining 98 were treated to 38.5 Gy. All patients were treated twice daily for 5 consecutive days. Univariate and multivariate analyses were performed. Results: The median follow-up was 13 months. No recurrences or deaths were observed. Of the 105 patients, 30 reported mild or moderate breast pain in their most recently recorded follow-up visit. The irradiated lung volume (p < 0.05) and chest wall volume receiving >35 Gy (p < 0.01) were associated with pain. The PTV, but not the PTV/IBV ratio, also correlated with pain (p < 0.01 and p = 0.42, respectively). A total of 72 patients reported excellent, 32 reported good, and 1 reported poor cosmesis. Physician-rated cosmesis reported 90 excellent and 15 good. None of the tested variables correlated with the cosmetic outcomes. Conclusion: Radiotherapy to the chest wall (chest wall volume receiving >35 Gy) and to lung correlated with reports of mild pain after accelerated partial breast intensity-modulated radiotherapy. Also, the PTV, but not the PTV/IBV ratio, was predictive of post-treatment reports of pain.
- OSTI ID:
- 21276776
- Journal Information:
- International Journal of Radiation Oncology, Biology and Physics, Vol. 74, Issue 1; Other Information: DOI: 10.1016/j.ijrobp.2008.06.1917; PII: S0360-3016(08)02950-7; Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0360-3016
- Country of Publication:
- United States
- Language:
- English
Similar Records
Prospective Trial of Accelerated Partial Breast Intensity-Modulated Radiotherapy
Hypofractionated Whole-Breast Radiation Therapy: Does Breast Size Matter?