Inferior pelvic subsite
(sphincter complex and ischiorectal fossae)
–
IPS
has a risk of
LR: 4%,
– low seated tumors
(<6 cm
from the AV):
8%
– after APR:
11%
–
Reccomendation for inclusion in CTV
• T < 6 cm from AV (central part), when a SSS
• T invading anal sphincter and APR
Roels et al IJROBP 2006