title: Toxicity and Long-Term Outcomes of Dose-Escalated Intensity Modulated Radiation Therapy to 74Gy for Localised Prostate Cancer in a Single Australian Centre.
abstract: OBJECTIVE
  To report the toxicity and long-term outcomes of dose-escalated intensity-modulated radiation therapy (IMRT) for patients with localised prostate cancer.
  
  
  METHODS
  From 2001 to 2005, a total of 125 patients with histologically confirmed T1-3N0M0 prostate cancer were treated with IMRT to 74Gy at the Austin Health Radiation Oncology Centre. The median follow-up was 5.5 years (range 0.5-8.9 years). Biochemical prostate specific antigen (bPSA) failure was defined according to the Phoenix consensus definition (absolute nadir + 2ng/mL). Toxicity was scored according to the RTOG/EORTC criteria. Kaplan-Meier analysis was used to calculate toxicity rates, as well as the risks of bPSA failure, distant metastases, disease-specific and overall survival, at 5 and 8-years post treatment.
  
  
  RESULTS
  All patients completed radiotherapy without any treatment breaks. The 8-year risks of ≥ Grade 2 genitourinary (GU) and gastrointestinal (GI) toxicity were 6.4% and 5.8% respectively, and the 8-year risks of ≥ Grade 3 GU and GI toxicity were both < 0.05%. The 5 and 8-year freedom from bPSA failure were 76% and 58% respectively. Disease-specific survival at 5 and 8 years were 95% and 91%, respectively, and overall survival at 5 and 8 years were 90% and 71%, respectively.
  
  
  CONCLUSIONS
  These results confirm existing international data regarding the safety and efficacy of dose-escalated intensity-modulated radiation therapy for localised prostate cancer within an Australian setting.
authors.affiliation: Austin Health Radiation Oncology Centre, Heidelberg Repatriation Hospital, 300 Waterdale Road, Heidelberg West, Victoria 3081, Australia. vincent.khoo@rmh.nhs.uk.
authors.forename: Joseph
authors.initials: J
authors.lastname: Sia
authors.forename: Daryl Lim
authors.initials: DL
authors.lastname: Joon
authors.forename: Angela
authors.initials: A
authors.lastname: Viotto
authors.forename: Carmel
authors.initials: C
authors.lastname: Mantle
authors.forename: George
authors.initials: G
authors.lastname: Quong
authors.forename: Aldo
authors.initials: A
authors.lastname: Rolfo
authors.forename: Morikatsu
authors.initials: M
authors.lastname: Wada
authors.forename: Nigel
authors.initials: N
authors.lastname: Anderson
authors.forename: Maureen
authors.initials: M
authors.lastname: Rolfo
authors.forename: Vincent
authors.initials: V
authors.lastname: Khoo