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Radiation therapy for prostatic cancer

K Matsumoto, Y Nishio

    The Prostate. Supplement
    |January 1, 1981
    PubMed
    Summary

    Radiation therapy significantly improved survival for early-stage prostate cancer patients but showed no benefit for advanced stages. Histological changes were observed, but not dose-dependent.

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    Area of Science:

    • Oncology
    • Radiation Oncology
    • Urologic Oncology

    Background:

    • Prostate cancer is a significant health concern.
    • Treatment options include radiation therapy.
    • Understanding radiation therapy's efficacy across different stages is crucial.

    Purpose of the Study:

    • To evaluate the effectiveness of radiation therapy in treating prostatic cancer.
    • To assess survival rates and histological changes post-radiation.
    • To determine radiation therapy's impact based on disease stage.

    Main Methods:

    • Retrospective analysis of 124 prostate cancer patients from 1962-1980.
    • 115 patients received radiation therapy.
    • Survival rates, histological changes, and rectal examination findings were analyzed by disease stage.

    Main Results:

    • Five-year survival for Stages I/II: 72% (radiation) vs. 33% (non-radiation).
    • No survival difference for Stages III/IV between groups.
    • Radiation therapy effective in 93% (Stages I/II), 75% (Stage III), 71% (Stage IV) by rectal exam.
    • Histological changes observed, unrelated to stage or radiation dose (4,000-6,000 rads).
    • Reactivation rates: 28% (Stages I/II), 12% (Stage III), 43% (Stage IV).

    Conclusions:

    • Radiation therapy offers a significant survival benefit for early-stage (I/II) prostate cancer.
    • Radiation therapy's benefit is not evident in advanced-stage (III/IV) prostate cancer.
    • Observed histological changes suggest radiation's impact on cancer cells, but clinical benefit is stage-dependent.

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