Delineation guideline for the para-aortic lymph node region in cervical cancer

We read with great interest the paper entitled, "An atlas to aid delineation of para-aortic lymph node region in cervical cancer: Design and validation of contouring guidelines," which addresses guidelines for delineating the para-aortic lymph node (PAN) clinical target volume (CTV) in patients with cervical cancer [1]. The authors evaluated 21 patients with 39 pathological PANs identified via positron emission tomography–computed tomography (PET-–CT) and used asymmetrical margins to expand the aorta and inferior vena cava (IVC) and create a CTV with more favourable PAN coverage.

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