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Erschienen in: Annals of Surgical Oncology 9/2015

01.09.2015 | Bone and Soft Tissue Sarcomas

Retroperitoneal Sarcoma (RPS) High Risk Gross Tumor Volume Boost (HR GTV Boost) Contour Delineation Agreement Among NRG Sarcoma Radiation and Surgical Oncologists

verfasst von: Elizabeth H. Baldini, MD, MPH, Walter Bosch, DSc, John M. Kane III, MD, Ross A. Abrams, MD, Kilian E. Salerno, MD, Curtiland Deville, MD, Chandrajit P. Raut, MD, MSc, Ivy A. Petersen, MD, Yen-Lin Chen, MD, John T. Mullen, MD, Keith W. Millikan, MD, Giorgos Karakousis, MD, Michael L. Kendrick, MD, Thomas F. DeLaney, MD, PhD, Dian Wang, MD, PhD

Erschienen in: Annals of Surgical Oncology | Ausgabe 9/2015

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Abstract

Purpose

Curative intent management of retroperitoneal sarcoma (RPS) requires gross total resection. Preoperative radiotherapy (RT) often is used as an adjuvant to surgery, but recurrence rates remain high. To enhance RT efficacy with acceptable tolerance, there is interest in delivering “boost doses” of RT to high-risk areas of gross tumor volume (HR GTV) judged to be at risk for positive resection margins. We sought to evaluate variability in HR GTV boost target volume delineation among collaborating sarcoma radiation and surgical oncologist teams.

Methods

Radiation planning CT scans for three cases of RPS were distributed to seven paired radiation and surgical oncologist teams at six institutions. Teams contoured HR GTV boost volumes for each case. Analysis of contour agreement was performed using the simultaneous truth and performance level estimation (STAPLE) algorithm and kappa statistics.

Results

HRGTV boost volume contour agreement between the seven teams was “substantial” or “moderate” for all cases. Agreement was best on the torso wall posteriorly (abutting posterior chest abdominal wall) and medially (abutting ipsilateral para-vertebral space and great vessels). Contours varied more significantly abutting visceral organs due to differing surgical opinions regarding planned partial organ resection.

Conclusions

Agreement of RPS HRGTV boost volumes between sarcoma radiation and surgical oncologist teams was substantial to moderate. Differences were most striking in regions abutting visceral organs, highlighting the importance of collaboration between the radiation and surgical oncologist for “individualized” target delineation on the basis of areas deemed at risk and planned resection.
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Metadaten
Titel
Retroperitoneal Sarcoma (RPS) High Risk Gross Tumor Volume Boost (HR GTV Boost) Contour Delineation Agreement Among NRG Sarcoma Radiation and Surgical Oncologists
verfasst von
Elizabeth H. Baldini, MD, MPH
Walter Bosch, DSc
John M. Kane III, MD
Ross A. Abrams, MD
Kilian E. Salerno, MD
Curtiland Deville, MD
Chandrajit P. Raut, MD, MSc
Ivy A. Petersen, MD
Yen-Lin Chen, MD
John T. Mullen, MD
Keith W. Millikan, MD
Giorgos Karakousis, MD
Michael L. Kendrick, MD
Thomas F. DeLaney, MD, PhD
Dian Wang, MD, PhD
Publikationsdatum
01.09.2015
Verlag
Springer US
Erschienen in
Annals of Surgical Oncology / Ausgabe 9/2015
Print ISSN: 1068-9265
Elektronische ISSN: 1534-4681
DOI
https://doi.org/10.1245/s10434-015-4633-x

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