Faculty Collaboration Database

Pathologic Complete Response and Clinical Outcomes in Patients With Localized Soft Tissue Sarcoma Treated With Neoadjuvant Chemoradiotherapy or Radiotherapy: The NRG/RTOG 9514 and 0630 Nonrandomized Clinical Trials. JAMA Oncol 2023 May 01;9(5):646-655

Date

03/31/2023

Pubmed ID

36995690

Pubmed Central ID

PMC10064284

DOI

10.1001/jamaoncol.2023.0042

Scopus ID

2-s2.0-85159731499 (requires institutional sign-in at Scopus site)   19 Citations

Abstract

IMPORTANCE: Pathologic complete response (pCR) may be associated with prognosis in patients with soft tissue sarcoma (STS).

OBJECTIVE: We sought to determine the prognostic significance of pCR on survival outcomes in STS for patients receiving neoadjuvant chemoradiotherapy (CT-RT) (Radiation Therapy Oncology Group [RTOG] 9514) or preoperative image-guided radiotherapy alone (RT, RTOG 0630) and provide a long-term update of RTOG 0630.

DESIGN, SETTING, AND PARTICIPANTS: RTOG has completed 2 multi-institutional, nonrandomized phase 2 clinical trials for patients with localized STS. One hundred forty-three eligible patients from RTOG 0630 (n = 79) and RTOG 9514 (n = 64) were included in this ancillary analysis of pCR and 79 patients from RTOG 0630 were evaluated for long-term outcomes.

INTERVENTION: Patients in trial 9514 received CT interdigitated with RT, whereas those in trial 0630 received preoperative RT alone.

MAIN OUTCOMES AND MEASURES: Overall and disease-free survival (OS and DFS) rates were estimated by the Kaplan-Meier method. Hazard ratios (HRs) and P values were estimated by multivariable Cox model stratified by study, where possible; otherwise, P values were calculated by stratified log-rank test. Analysis took place between December 14, 2016, to April 13, 2017.

RESULTS: Overall there were 42 (53.2%) men; 68 (86.1%) were white; with a mean (SD) age of 59.6 (14.5) years. For RTOG 0630, at median follow-up of 6.0 years, there was 1 new in-field recurrence and 1 new distant failure since the initial report. From both studies, 123 patients were evaluable for pCR: 14 of 51 (27.5%) in trial 9514 and 14 of 72 (19.4%) in trial 0630 had pCR. Five-year OS was 100% for patients with pCR vs 76.5% (95% CI, 62.3%-90.8%) and 56.4% (95% CI, 43.3%-69.5%) for patients with less than pCR in trials 9514 and 0630, respectively. Overall, pCR was associated with improved OS (P = .01) and DFS (HR, 4.91; 95% CI, 1.51-15.93; P = .008) relative to less than pCR. Five-year local failure rate was 0% in patients with pCR vs 11.7% (95% CI, 3.6%-25.1%) and 9.1% (95% CI, 3.3%-18.5%) for patients with less than pCR in 9514 and 0630, respectively. Histologic types other than leiomyosarcoma, liposarcoma, and myxofibrosarcoma were associated with worse OS (HR, 2.24; 95% CI, 1.12-4.45).

CONCLUSIONS AND RELEVANCE: This ancillary analysis of 2 nonrandomized clinical trials found that pCR was associated with improved survival in patients with STS and should be considered as a prognostic factor of clinical outcomes for future studies.

TRIAL REGISTRATION: ClinicalTrials.gov Identifiers: RTOG 0630 (NCT00589121); RTOG 9514 (NCT00002791).

Author List

Wang D, Harris J, Kraybill WG, Eisenberg B, Kirsch DG, Ettinger DS, Kane JM 3rd, Barry PN, Naghavi A, Freeman CR, Chen YL, Hitchcock YJ, Bedi M, Salerno KE, Severin D, Godette KD, Larrier NA, Curran WJ Jr, Torres-Saavedra PA, Lucas DR

Author

Manpreet Bedi MD, MS Professor in the Radiation Oncology department at Medical College of Wisconsin

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

Adult
Disease-Free Survival
Female
Humans
Male
Middle Aged
Neoadjuvant Therapy
Prognosis
Sarcoma