Fig. 3From: Have we achieved adequate recommendations for target volume definitions in anal cancer? A PET imaging based patterns of failure analysis in the context of established contouring guidelinesPET-positive superomedial superficial inguinal LN (a–c) in anal cancer patients (SUVmax /SUVmean: 3a: 13.3/8.4; 3b: 6.0/3.6; 3c: 5.9/3.4). Those were not properly covered by the elective CTV recommendations of RTOG (d) and AGITG (e) but completely included in the CTV of BNG (f)Back to article page