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1999年6月から2002年12月までに当科で放射線単独療法を施行したT1-3N0M0の前立腺癌35例の短期的な治療効果を検討した。3年間のPSA非再発率は83.5%であった。PSA nadirまでの期間がPSA再発を予測する因子であった。前立腺容積は治療後明らかに減少しており,さらに排尿状態の悪化は認めなかった。合併症として頻尿,放射線性直腸炎を認めたが,いずれも軽症であった。限局性および局所浸潤性前立腺癌に対し放射線単独療法は短期的には有効な治療方法であると考える。
We herein report short-term clinical outcomes of conformal external radiation monotherapy for patients with clinically localized and locally advanced prostate cancer at our institute. We treated 35 patients with T1-3N0M0 prostate cancer with conformal external radiation monotherapy and evaluated clinical outcomes of this treatment,including voiding status. During the 12~54 months follow-up period,the 3-year biochemical control rate was 83.5%. Univariate analysis showed that the time until the PSA nadir was associated with a higher probability of biochemical failure(p<0.0001). Patients with a longer time to PSA nadir experienced a better biological control rate than those with a shorter one. Ten patients(28.6%)had mild urinary frequency,and 4(11.4%)suffered from radiation colitis,but no patient needed transfusion. Conformal external radiation monotherapy for patients with T1-3N0M0 prostate cancer was shown to be effective in short-term observation.
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