Target Volume Determination 2015

CTVA: internal iliac, pre-sacral, peri-rectal. CTVB: external iliac nodal region CTVC: inguinal nodal region Elective nodal CTVs

LIMITATIONS: • no clear definition of the different anatomical boundaries

Myerson RJ, Garofalo MC, El Naqa I, et al. Int J Radiat Oncol Biol Phys. 2009