Rectal function following permanent prostate brachytherapy.

Abstract

The purpose of this study was to review the clinical presentation, dosimetry, quality of life assessment, and management of proctitis following permanent prostate brachytherapy. The permanent prostate brachytherapy literature was reviewed using MEDLINE searches to ensure completeness. Rectal complications primarily consist of mild, self-limited proctitis. Rectal bleeding has been correlated with rectal dose. Dose response analysis has demonstrated that the risk of proctitis strongly correlates with the volume of rectal tissue exposed to a given dose. The reported incidence of rectal ulceration/fistula formation is < or = 1%. Constipation significantly increases the radiation dose to the rectum and potentially may contribute to brachytherapy-related morbidity. Quality of life assessments obtained via patient-administered instruments and by physician interview have illustrated that long-term bowel dysfunction is relatively uncommon. Significant bowel dysfunction following prostate brachytherapy is relatively rare, but rectal bleeding has been correlated with radiation dose. Routine post-brachytherapy biopsies of the anterior rectal wall are strongly contraindicated. The continued elucidation of the etiology of bowel dysfunction should result in refinements in implant technique and decreased brachytherapy-related morbidity.