Carlos E. Vargas, M.D.

The purpose of this study is to determine if salvage stereotactic body radiotherapy (SBRT) is non-inferior to moderately hypofractionated radiation therapy (HFRT) regarding treatment related rates of genitourinary (GU) and gastrointestinal (GI) Grade 3 or higher within 2-years.

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 the safety of 5 fraction vs. 25 fraction radiation to the whole breast or post-mastectomy chest wall/reconstructed chest with regional nodal radiation.

The purpose of this study is to evaluate whether breast conservation surgery and endocrine therapy results in a non-inferior rate of invasive or non-invasive ipsilateral breast tumor recurrence (IBTR) compared to breast conservation with breast radiation and endocrine therapy.

The purpose of this study is to compare the effects, good and/or bad of two treatment methods on subjects and their cancer. Proton beam radiation therapy is one of the treatments for men with prostate cancer who have localized disease. The benefit of the combination with androgen suppression is not completely understood. This study will compare the use of hypofraction proton therapy (28 treatments) alone to proton therapy with androgen suppression therapy.

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 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.

This phase II trial studies how well hypofractionated radiation therapy works in treating participants with prostate cancer high-risk features following radical prostatectomy. Hypofractionated radiation therapy delivers higher doses of radiation therapy over a shorter period of time and may kill more tumor cells and have fewer side effects.

The optimal dose and fractionation regimen for whole breast irradiation, whole breast and regional nodal irradiation, and postmastectomy radiotherapy remains unknown. The goal of this phase II randomized controlled trial is to determine whether the hypofractionated proton regimens proposed are non-inferior compared with standard fractionated proton radiotherapy and therefore worthy of further investigation.

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.

This is a pilot study to test a hypothesis that a greater increase in serum chromogranin A (CgA) after a definitive radiotherapy (RT) with or without androgen deprivation therapy (ADT) is associated with a higher risk of prostate cancer recurrence after RT. Serum CgA level is measured before the start of RT and/or the start of neoadjuvant ADT for patients undergoing a definitive RT with or without ADT. CgA is also measured at various pre-defined post-RT time points. The study will analyze the followings: 1. Change in CgA level at various pre-defined post-RT time points from the baseline, 2. Correlation between the extent of post-therapy CgA change and Gleason score of malignancy, 3. Correlation between the extent of post-therapy CgA change and treatment outcome.

To collect and analyze specimens that will correlate with clinical outcomes such as acute and late toxicities, quality of life, local control, and survival of patients treated with radiation therapy.

The purpose of this trial is to determine the safety of 15 fraction vs 25 fraction pencil beam scanning proton radiotherapy after mastectomy in patients requiring regional nodal irradiation. Proton therapy is recognized as a standard option for the delivery of radiotherapy for breast cancer.

The purpose of this study is to determine the 12-month cardiac event rate  after radiation or chemo-radiation for the treatment of lung or esophageal cancer.

The purpose of this trial is to determine the patient's pathological response after hypofractionated radiotherapy to the whole breast based on a specimen after surgery. The analysis of tumor mutation may lead to a better understanding of the effect of radiotherapy in breast cancer.

The purpose of this study is to determine the safety of 5 fraction vs. 25 fraction radiation to the whole breast or post-mastectomy chest wall/reconstructed chest with regional nodal radiation.

The purpose of this study is to evaluate whether breast conservation surgery and endocrine therapy results in a non-inferior rate of invasive or non-invasive ipsilateral breast tumor recurrence (IBTR) compared to breast conservation with breast radiation and endocrine therapy.

The purpose of this study is to determine the ability to capture PROs during patients’ radiation and during 3 months after.

Additionally, the study plans to conduct a retrospective chart review of prospectively accrued patients and ask subjects to complete a questionnaire.

The purpose of this study is to evaluate the safety and effectiveness of a moderate hypofractionation regimen of proton beam therapy with same time treatment of the prostate, seminal vesicles, and the regional pelvic nodes  for patients who have clinically localized, high risk or unfavorable intermediate risk prostate cancer.