How do you contour your elective obturator lymph node volume?

There is variability in how different atlases and references contour this volume: some stop contours after the obturator artery passes lateral to the obturator internus muscle, others stop them inferior to this, while others stop them at the junction of the seminal vesicles and prostate gland. Do you include the obturator artery in your CTV after it crosses lateral to the obturator internus muscle?

Answer from: Radiation Oncologist at Community Practice

I favor stopping once the obturator vessel exits the pelvis and is lateral to internus muscle like NRG gyn atlas. Feel the extending contour below that exposes more rectum. We highlighted the differences between prostate and gyn atlas in this letter to the editor: Musunuru et al., International Jou...

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Radiation Oncologist at Mallory Radiotherapy, PLLC
On page 19 of the UK anal cancer guidelines, there...

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How do you contour your elective obturator lymph node volume?

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