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Nodal CTV
(
CTV-E
)
•
Paraaortic
•
Common iliac
•
External iliac
•
Internal iliac
•
Obturator
•
Presacral
•
Inguinal (in stage IIIa)
Lymph nodes are located around vessels
Nodal CTV contouring = Delineation of vessels with margins
Which margin/s are necessary ?