Partial Breast Irradiation Using Accelerated Intensity Modulated Radiotherapy
This is a phase I- II feasibility study for delivering partial breast irradiation (PBI) in selected patients with early stage, lymph node negative, breast cancer after breast-conserving surgery using accelerated Intensity Modulated Radiotherapy (IMRT).
|Study Design:||Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
|Official Title:||Partial Breast Irradiation Using Accelerated Intensity Modulated Radiotherapy in Early Stage Breast Cancer After Breast-Conserving Surgery|
- To determine the rate of local control of cancer in the treated breast at 2 years following breast-conserving surgery and partial breast radiotherapy using IMRT. [ Time Frame: 2 years after radiation ] [ Designated as safety issue: Yes ]
- To determine the rate of acute adverse events, primarily ipsilateral breast skin toxicity during the course of the treatment, and late toxicity at follow-up visits over 5 years. [ Time Frame: 5 years after radiation ] [ Designated as safety issue: Yes ]
- Evaluate dosimetric and volumetric differences between tmt plans for partial breast irradiation and other treatment planning methods for the target (partial breast) and organs at risk (e.g. heart, ipsilateral lung, contralateral breast)a subset of 20. [ Time Frame: not specific ] [ Designated as safety issue: No ]
- To evaluate the impact of short term accelerated partial breast radiation therapy on the quality of life and to asses the cosmetic results. [ Time Frame: 2 years after radiation ] [ Designated as safety issue: No ]
|Study Start Date:||November 2004|
|Estimated Study Completion Date:||November 2014|
|Primary Completion Date:||October 2010 (Final data collection date for primary outcome measure)|
Experimental: Only 1 tmt arm
Accelerated radiotherapy, 3.85 Gy per fraction, bid, for 5 consecutive days for a total dose of 38.5 Gy.
Patients on protocol will be treated with accelerated radiotherapy, 3.85 Gy per fraction, bid, for 5 consecutive days for a total dose of 38.5 Gy.
This is a non-randomized Phase I-II feasibility study of partial breast irradiation with accelerated IMRT technique. In this study, patients will be eligible if the estimated risk of breast cancer elsewhere in the breast (beyond the tumor bed) is low. The radiation treatment will be available to women who are older than 40 years, have a DCIS or T1, N0, M0, (AJCC classification, version 6.0), non-lobular infiltrating carcinoma treated with breast-conserving surgery.
Patients will undergo a pre-treatment planning free breathing CT with 5mm cuts in the treatment position, on a breast board, with both arms extended above their head that will be used to plan the traditional two field (tangent) plan. An Active Breathing Control (ABC) device will be used to minimize target motion due to breathing during a second CT scan. The lumpectomy cavity will be identified and delineated, and margins of approximately 1.5 cm in three dimensions will be used to allow for subclinical tumor extension and daily set-up error. The organs at risk (heart, lungs, contralateral breast) will be contoured on both CT scans. An inverse planning system and optimization tools will be employed in order to achieve the best IMRT plan (to minimize the dose to the heart, lungs and contralateral breast), that will be compared to the two field plan. If the IMRT plan is shown to be the optimal one, in terms of doses to organs at risk, then the patient will be enrolled in the protocol and will proceed with the treatment. Treatment will start approximately two weeks after the planning CT is obtained. All patients on protocol will be treated with accelerated radiotherapy, 3.85 Gy per fraction, bid, for 5 consecutive days for a total dose of 38.5 Gy.
|United States, Michigan|
|University of Michigan|
|Ann Arbor, Michigan, United States, 48109-5010|
|Principal Investigator:||Lori J Pierce, MD||University of Michigan|