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Significant Reduction of Late Toxicities in Patients With Extremity Sarcoma Treated With Image-Guided Radiation Therapy to a Reduced Target Volume: Results of Radiation Therapy Oncology Group RTOG-0630 Trial. J Clin Oncol 2015 Jul 10;33(20):2231-8

Date

02/11/2015

Pubmed ID

25667281

Pubmed Central ID

PMC4486342

DOI

10.1200/JCO.2014.58.5828

Scopus ID

2-s2.0-84937835298   155 Citations

Abstract

PURPOSE: We performed a multi-institutional prospective phase II trial to assess late toxicities in patients with extremity soft tissue sarcoma (STS) treated with preoperative image-guided radiation therapy (IGRT) to a reduced target volume.

PATIENTS AND METHODS: Patients with extremity STS received IGRT with (cohort A) or without (cohort B) chemotherapy followed by limb-sparing resection. Daily pretreatment images were coregistered with digitally reconstructed radiographs so that the patient position could be adjusted before each treatment. All patients received IGRT to reduced tumor volumes according to strict protocol guidelines. Late toxicities were assessed at 2 years.

RESULTS: In all, 98 patients were accrued (cohort A, 12; cohort B, 86). Cohort A was closed prematurely because of poor accrual and is not reported. Seventy-nine eligible patients from cohort B form the basis of this report. At a median follow-up of 3.6 years, five patients did not have surgery because of disease progression. There were five local treatment failures, all of which were in field. Of the 57 patients assessed for late toxicities at 2 years, 10.5% experienced at least one grade ≥ 2 toxicity as compared with 37% of patients in the National Cancer Institute of Canada SR2 (CAN-NCIC-SR2: Phase III Randomized Study of Pre- vs Postoperative Radiotherapy in Curable Extremity Soft Tissue Sarcoma) trial receiving preoperative radiation therapy without IGRT (P < .001).

CONCLUSION: The significant reduction of late toxicities in patients with extremity STS who were treated with preoperative IGRT and absence of marginal-field recurrences suggest that the target volumes used in the Radiation Therapy Oncology Group RTOG-0630 (A Phase II Trial of Image-Guided Preoperative Radiotherapy for Primary Soft Tissue Sarcomas of the Extremity) study are appropriate for preoperative IGRT for extremity STS.

Author List

Wang D, Zhang Q, Eisenberg BL, Kane JM, Li XA, Lucas D, Petersen IA, DeLaney TF, Freeman CR, Finkelstein SE, Hitchcock YJ, Bedi M, Singh AK, Dundas G, Kirsch DG

Authors

Manpreet Bedi MD, MS Associate Professor in the Radiation Oncology department at Medical College of Wisconsin
Xiaochuan Allen Li PhD Professor in the Radiation Oncology department at Medical College of Wisconsin




MESH terms used to index this publication - Major topics in bold

Adult
Aged
Aged, 80 and over
Chemoradiotherapy, Adjuvant
Disease Progression
Disease-Free Survival
Extremities
Female
Humans
Kaplan-Meier Estimate
Male
Middle Aged
Neoadjuvant Therapy
Neoplasm Recurrence, Local
North America
Prospective Studies
Radiation Injuries
Radiotherapy, Adjuvant
Radiotherapy, Conformal
Radiotherapy, Image-Guided
Radiotherapy, Intensity-Modulated
Risk Factors
Sarcoma
Time Factors
Treatment Outcome
Tumor Burden
Young Adult