Target Volumes
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GTV : Tumor + involved nodes
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From DRE, EUS, MRI, CT and/or
18
FDG-PET
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CTV : ENI +/- ischiorectal fossa (low rectum)
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Whole mesorectum
•
Standard : perirectal nodes, internal iliac, superior
rectal artery
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T4 anterior (+ external iliac nodes)
•
T4 anal canal (+ external iliac and inguinal nodes)