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RATIONALE: Specialized radiation therapy that delivers a high dose of radiation directly to the tumor may kill more tumor cells and cause less damage to normal tissue.
I. Feasibility of proton radiation therapy (RT) using standard fractionation.
I. To determine freedom from failure (FFF) (vs. biochemical/clinical progression-free survival) with standard fractionation.
II. To determine the incidence of grade 2 or greater GU and GI toxicity with this regimen at 6 months, 2 years and 3 years.
III. To assess quality of life issues following completion of radiation therapy at 6 months and at 2 years.
IV. To assess incidence of impotence after the use of proton therapy at 3 years.
V. To determine freedom from biochemical failure (BF) at 5 years.
VI. To determine clinical failure: local and/or distant at 5 years. VII. To determine salvage androgen deprivation (SAD) use at 5 years. VIII. To determine progression free survival: using clinical, biochemical and SAD as events at 5 years.
IX. To determine overall survival at 5 years. X. To determine disease-specific survival at 5 years.
XI. Estimate prostate and normal structures movement during RT with the use of scans.
XII. Correlate pathologic and radiologic findings with outcomes at 5 years. XIII. Correlate PSA and free PSA levels with outcomes at 5 years. XIV. Correlate testosterone levels and variation with proton therapy and outcomes at 5 years.
XV. Develop a quality assurance process for proton prostate therapy.
Patients undergo proton radiotherapy once daily 5 days a week for approximately 9 weeks in the absence of disease progression or unacceptable toxicity.
After completion of study treatment, patients are followed at 3 months, every 6 months for 5 years, and then annually thereafter.
Endpoint Classification: Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment
Proton Beam Radiation Therapy, Quality-of-Life assessment, Questionnaire Administration
Abramson Cancer Center of the University of Pennsylvania
Abramson Cancer Center of the University of Pennsylvania
Published on BioPortfolio: 2014-08-27T03:16:47-0400
RATIONALE: Specialized radiation therapy, such as proton beam radiation therapy, that delivers a high dose of radiation directly to the tumor may kill more tumor cells and cause less damag...
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An optical source that emits photons in a coherent beam. Light Amplification by Stimulated Emission of Radiation (LASER) is brought about using devices that transform light of varying frequencies into a single intense, nearly nondivergent beam of monochromatic radiation. Lasers operate in the infrared, visible, ultraviolet, or X-ray regions of the spectrum.
Preliminary cancer therapy (chemotherapy, radiation therapy, hormone/endocrine therapy, immunotherapy, hyperthermia, etc.) that precedes a necessary second modality of treatment.
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Organs which might be damaged during exposure to a toxin or to some form of therapy. It most frequently refers to healthy organs located in the radiation field during radiation therapy.
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