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25 pts rectal cancer
CT (red) shows a more caudal
extension of GTV and PET
shows uptake in a presacral
lymph node <1.5 cm in size
PET/CT for preoperative radiotherapy of rectal cancer lead to a change in staging
and target volume delineation.
Stage variation was observed in 12% of cases and a change of treatment intent
in 4%.
The GTV and CTV changed significantly, with a mean increase in size of 25% and
4%, respectively.
Bassi et al. Int J Rad Onc Biol Phys, 2008
PET/CT and RT in Colorectal cancer