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• RTOG 75-06 (1976-1983)
  • Randomized. 523 patients with clinical Stage A2-B N+ or Stage C. Arm 1) Pelvic RT 40-45 Gy + prostate boost 20-25 Gy (minimum 65 Gy) vs. Arm 2) Pelvic + PA RT 40-45 Gy + prostate boost (minimum 65 Gy)
  • 1986 PMID 3514555 -- "Extended field (periaortic) irradiation in carcinoma of the prostate--analysis of RTOG 75-06." (Pilepich MV, Int J Radiat Oncol Biol Phys. 1986 Mar;12(3):345-51.). Median F/U 4.2 years
    • Outcome: No difference between arms for DFS, DM, OS
    • Toxicity: Periaortic RT does not increase bowel injury. Prostate doses >70Gy result in increased bowel injury (20% vs 10% rectal bleed) but not bladder injury
    • Conclusion: No benefit to elective peri-aortic irradiation