Effect of pretreatment prostate volume on urinary quality of life following intensity-modulated radiation therapy for localized prostate cancer.

Background: The aim of this study was to describe the effect of pretreatment prostate volume on urinary quality of life after intensity-modulated radiation therapy (IMRT) for clinically localized prostate cancer.

Methods: A total of 368 men treated with prostate IMRT (77.4-81 Gy) were stratified into three gland volume groups, ie, <30 g (group 1), 30-60 g (group 2), and >60 g (group 3).