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Rationale for ExtendedPelvic and Iliac LND• Standard LND includesexternal/internal iliac andobturator lymph nodes– Identifies ≥95% of N1; skipmetastases rare• Extended LND includes presacral,CI and distal aorta/IVCnodes– increases node yield by 34-40%– 36-43% of P3,P4N+ have nodemetastasis above CI bifurcation