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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