Gynae BT_Lucknow_2018

Take home message: nodal CTV

 Margins add to considerable irradiation of normal tissue

 PTV margin for elective target volume:

 7-10mm margin without daily image guidance

 5mm margin with daily image guidance and bony fusion

 Potential in pelvic elective radiotherapy to reduce irradiated volume by 40% with IMRT and daily IGRT (2500cc → 1500cc)

Pattern of nodal failure (EMBRACE) 152 failures in 1338 pts (11%)  Inside elective target volume: 41%  Outside elective target volume: 41% (39% PAO)  In boosted nodes: 35%

25