Characteristics of and Differences in ENRT Templates
| Region | RTOG | PIVOTAL | NRG |
|---|---|---|---|
| Cranial border | L5/S1 interspace | Lower border of L5 | Bifurcation of aorta or inferior caval vein (typically L4/L5) |
| Margin around vessels | 7 mm (carving out bone, bowel, bladder) | 7 mm (carving out bone, bladder, muscle, rectum, bowel + 3 mm) | 5–7 mm (carving out bone, bladder, muscle, bowel), enlarge to 10 mm when indicated |
| Presacral nodes | S1–S3, 10 mm anterior to sacrum | S1–S3, 12 mm anterior to sacrum | Presacral, prevertebral and posterior perirectal nodes until S3 |
| External iliac nodes | Until top of femoral heads | Until top of femoral heads | Until vessels are more lateral than the most medial aspect of the acetabulum (typically middle of femoral head) |
| Obturator nodes | Until top of pubic symphysis | Until 1 cm above top of symphysis | Until midportion of prostate bed (in definitive setting until seminal vesicles join the prostate) |