Prostate　cancer　is　the　most　common　noncutaneous　malignancy　of　men　and　the　second　greatest　cause　of　male cancer　death　in　the　USA.　With　the　widespread　use　of　prostate-specific　antigen (PSA) screening　over　the　past decade,　more　men　are　being diagnosed　with　early-stage,　localised　prostate　cancer. Several　effective　treatment options　are　available　for　patients　with　carly　prostate　cancer　today.　Prostate　brachythcrapy　has　especiany　become　an　accepted　treatment　option　for　early　prostate　cancer　in　the　USA .　The　use　of　transrectal　ultrasound　ablows　the　accurate　implantation　of　radioactive　seeds　into　the　prostate .　The　results　of　brachytherapy　are comparable　with　those　of　both　radical　prostatectomy　and　external　beam　radiotherapy.　Additionally,　prostate brachytherapy　has　been　reported　to　have　lower　morbidity　than　radical　prostatectomy　or　external　beam　radio therapy.　In　Japan,1-125　prostate　brachytherapy　was　started　in　September　2003　and　has　rapidly　spread throughout　the　country.　It　will　deeelop　more　and　more.

講座