Abstract
Purpose
To assess oncological outcomes of patients receiving neoadjuvant radiochemotherapy (RCT) for soft tissue sarcoma (STS) of the extremities.
Methods
Patients who were treated with preoperative radiotherapy and concomitant chemotherapy—3 cycles of mitomycin/doxorubicin/cisplatin (MAP) or 2–4 cycles of doxorubicin/cisplatin (AP)—followed by surgery were analyzed retrospectively. Survival rates were estimated, and prognostic factors were identified.
Results
Between 1994 and 2017, a total of 108 patients were included. Median ages were 43 years and 51 years for patients receiving MAP and AP, respectively. The 5‑year local relapse-free survival (LRFS), disease-free survival (DFS), disease-specific survival (DSS), and overall survival (OS) were 94.1, 63.6, 75.3, and 71.9%, respectively. In the multivariate analysis, significant predictors were identified as follows: de novo or R1/R2 resected tumor on admission before RCT (p = 0.017; hazard ratio [HR] 0.112, 95% confidence interval [CI] 0.019–0.675) and R0 resection after RCT (p = 0.010; HR 0.121, 95% CI 0.024–0.598) for LRFS; female gender (p = 0.042; HR 0.569, 95% CI 0.330–0.979) and liposarcoma histology (p = 0.014; HR 0.436, 95% CI 0.224–0.845) for DFS; liposarcoma histology (p = 0.003; HR 0.114, 95% CI 0.027–0.478) and AP regimen (p = 0.017; HR 0.371, 95% CI 0.165–0.836) for DSS; age ≤ 45 years (p = 0.043; HR 0.537, 95% CI 0.294–0.980) and liposarcoma histology (p = 0.006; HR 0.318, 95% CI 0.141–0.716) for OS, respectively.
Conclusion
An increased risk for local failure seems to exist for patients with relapsed tumor on admission and having positive surgical margins after neoadjuvant RCT. Intensity of chemotherapy influenced DSS but not OS, which could be due to younger patients receiving MAP.
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Conceptualization: Ugur Yilmaz, Serra Kamer, Yavuz Anacak; Methodology: Ugur Yilmaz, Serra Kamer, Yavuz Anacak; Formal analysis and investigation: Ugur Yilmaz, Serra Kamer, Yavuz Anacak; Writing—original draft preparation: Ugur Yilmaz, Serra Kamer; Writing—review and editing: Yavuz Anaca; Resources: Ugur Yilmaz, Serra Kamer, Huseyin Kaya, Dundar Sabah, Ulus Ali Sanli, Ipek Tamsel, Banu Yaman, Taner Akalin, Yavuz Anacak; Supervision: Serra Kamer, Yavuz Anacak.
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U. Yilmaz, S. Kamer, H. Kaya, D. Sabah, U.A. Sanli, I. Tamsel, B. Yaman, T. Akalin and Y. Anacak declare that they have no competing interests.
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This study was approved by the institutional ethics committee (21-8T/56).
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Yilmaz, U., Kamer, S., Kaya, H. et al. Preoperative radiotherapy with concomitant chemotherapy in extremity soft tissue sarcomas: long-term results of a single center. Strahlenther Onkol 199, 585–594 (2023). https://doi.org/10.1007/s00066-022-02041-x
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DOI: https://doi.org/10.1007/s00066-022-02041-x