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M. Ng, et al. (AGITG) Int J Radiation Oncol Biol Phys, 2012
ELECTIVE NODAL VOLUMES
presacral space
external
iliac lymph
nodes
inguinal
lymph
nodes
internal iliac lymph
nodes
obturator lymph
nodes
ischiorectal fossa
mesorectum
CTV borders for individual nodal groups