Five years after having proton therapy for early- and intermediate-risk prostate cancer, 99 percent of men are living cancer-free and with excellent quality of life, according to a University of Florida Proton Therapy Institute study. Three-quarters of those with high-risk prostate cancer are also disease-free. The study, published in the International Journal of Radiation Oncology Biology Physics, adds to the body of evidence pointing to a significant role for proton therapy in the effective and efficient treatment of prostate cancer, said Nancy P. Mendenhall, M.D.

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