Carlos E. Vargas, M.D.

The purpose of this long term registry study is to collect and analyze information from patients being treated with various forms of radiation therapy to improve the treatment of future patients.

The purpose of ths study is to determine the outcomes and toxicity profile of preoperative treatment including chemotherapy and hypofractionated radiotherapy for different breast cancer risk groups.

The purpose of this study is to determine, with an acceptable upper bound confidence interval, disease free survival in patients who receive hypofractionated radiation for high risk prostate cancer. Exploratory objectives include chronic/late toxicity, among others. Late toxicity rates in the current study should besimilar to what is previously reported.

The purpose of this study is to determine freedom from ipsilateral breast recurrence occurrences in patients receiving partial breast proton radiation therapy limited to the region of the tumor at 3 years.

The purpose of this study is to determine if the 2-year rate of grade ≥3 treatment-related skin and soft tissue toxicities with comprehensive nodal irradiation for breast cancer using hypofractionated pencil beam scanning proton therapy (PBS-PT) is non-inferior to conventionally-fractionated PBS-PT.

The purpose of ths study is to determine the outcomes and toxicity profile of preoperative treatment including chemotherapy and hypofractionated radiotherapy for different breast cancer risk groups.

The purpose of this study is to compare the effects (good and bad) on patients with prostate cancer by comparing the standard dose of radiation therapy (44 treatments over 8½-9 weeks) with a higher daily dose of radiation (5 treatments over 1-2 weeks) to see if the effects of the treatments are similar or better.

RATIONALE: It is not yet know whether higher per daily radiation therapy is equally as effective as standard per daily radiation therapy in treating breast cancer.

PURPOSE: This randomized phase III trial studies how well an accelerated course of higher per daily radiation therapy with concomitant boost works compared to standard per daily radiation therapy with a sequential boost in treating patients with early-stage breast cancer that was removed by surgery.