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Dapper, H.* ; Oechsner, M.* ; Münch, S.* ; Diehl, C.* ; Peeken, J.C. ; Borm, K.* ; Combs, S.E.

Dosimetric comparison of organs at risk using different contouring guidelines for definition of the clinical target volume in anal cancer.

Strahlenther. Onkol. 196, 368–375 (2020)
Verlagsversion DOI
Open Access Gold (Paid Option)
Creative Commons Lizenzvertrag
Background There are different contouring guidelines for definition of the clinical target volume (CTV) for intensity-modulated radiation therapy (IMRT) of anal cancer (AC). We conducted a planning comparison study to evaluate and compare the dose to relevant organs at risk (OARs) while using different CTV definitions. Methods Twelve patients with a primary diagnosis of anal cancer, who were treated with primary chemoradiation (CRT), were selected. We generated four guideline-specific CTVs and subsequently planned target volumes (PTVs) on the planning CT scan of each patient. An IMRT plan for volumetric arc therapy (VMAT) was set up for each PTV. Dose parameters of the planned target volume (PTV) and OARs were evaluated and compared, too. Results The mean volume of the four PTVs ranged from 2138 cc to 2433 cc. The target volumes contoured by the authors based on the recommendations of each group were similar in the pelvis, while they differed significantly in the inguinal region. There were no significant differences between the four target volumes with regard to the dose parameters of the cranially located OARs. Conversely, some dose parameters concerning the genitals and the skin varied significantly among the different guidelines. Conclusion The four contouring guidelines differ significantly concerning the inguinal region. In order to avoid inguinal recurrence and to protect relevant OARs, further investigations are needed to generate uniform standards for definition of the elective clinical target volume in the inguinal region.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Schlagwörter Anal Cancer ; Contouring Guidelines ; Organs At Risk ; Dose Distribution ; Inguinal Lymph Nodes; Modulated Radiation-therapy; Squamous-cell Carcinoma; Concurrent Chemotherapy; Chemoradiation; Mitomycin; Radiotherapy; Cisplatin; Reduction; Outcomes
ISSN (print) / ISBN 0179-7158
e-ISSN 1439-099X
Quellenangaben Band: 196, Heft: , Seiten: 368–375 Artikelnummer: , Supplement: ,
Verlag Urban & Vogel
Verlagsort Tiergartenstrasse 17, D-69121 Heidelberg, Germany
Begutachtungsstatus Peer reviewed