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Elective nodal CTV: Cranial extension
high risk
intermediate risk
low risk
L2
L3
L4
L5
S2
From EMBRACE II protocol
Ongoing investigations and discussion (EMBRACE II)
•
Intermediate risk: upper border level of aortic bifurcation or defined by bony anatomy (L3/34)
•
High risk: Depending on extension of nodal disease into common iliac region consider or ≥ 3
pelvic nodes:
inclusion of low PAO region up to renal vessels (L2),
extension of at least 3 cm above highest affected node
•
Low risk (stage IB1, N0, PEC):
Upper border:
common iliac bifurcation