1478-1479 / 2953
Rectal IMRT: RTOG 0822
• Ph II evaluation of pre-operative CRT using
IMRT with capox
• Prospective study of IMRT use
• Standardised RTOG contouring atlas
• 79 pts, 68 evaluable, 51% ≥G2 GI toxicity, 18%
G3/4 diarrhoea
• NO reduction in rate of GI toxicity
Hong IJROBP 2015;93:29