Radiation Oncology Journal

The Korean Society for Radiation Oncology (대한방사선종양학회)
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Prognostic factors, failure patterns and survival analysis in patients with resectable oral squamous cell carcinoma of the tongue

  • Sharma, Kanika (Department of Radiation Oncology, Rajiv Gandhi Cancer Institute and Research Centre) ;
  • Ahlawat, Parveen (Department of Radiation Oncology, Rajiv Gandhi Cancer Institute and Research Centre) ;
  • Gairola, Munish (Department of Radiation Oncology, Rajiv Gandhi Cancer Institute and Research Centre) ;
  • Tandon, Sarthak (Department of Radiation Oncology, Rajiv Gandhi Cancer Institute and Research Centre) ;
  • Sachdeva, Nishtha (Department of Radiation Oncology, Rajiv Gandhi Cancer Institute and Research Centre) ;
  • Sharief, Muhammed Ismail (Department of Radiation Oncology, Rajiv Gandhi Cancer Institute and Research Centre)
  • Received : 2018.12.27
  • Accepted : 2019.05.27
  • Published : 2019.06.30
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Abstract

Purpose: There is sparse literature on treatment outcomes research on resectable oral tongue squamous cell carcinoma (OTSCC). The aim of this study was to measure the treatment outcomes, explore the failure patterns, and identify the potential clinicopathological prognostic factors affecting treatment outcomes for resectable OTSCC. Materials and Methods: It is a retrospective analysis of 202 patients with resectable OTSCC who underwent upfront primary surgical resection followed by adjuvant radiotherapy with or without concurrent chemotherapy if indicated. Results: The median follow-up was 35.2 months (range, 1.2 to 99.9 months). The median duration of locoregional control (LRC) was 84.9 months (95% confidence interval, 67.3-102.4). The 3- and 5-year LRC rate was 68.5% and 58.3%, respectively. Multivariate analysis showed that increasing pT stage, increasing pN stage, and the presence of extracapsular extension (ECE) were significantly associated with poorer LRC. The median duration of overall survival (OS) was not reached at the time of analysis. The 3- and 5-year OS rate was 70.5% and 66.6%, respectively. Multivariate analysis showed that increasing pT stage and the presence of ECE were significantly associated with a poorer OS. Conclusion: Locoregional failure remains the main cause of treatment failure in resectable OTSCC. There is scope to further improve prognosis considering modest LRC and OS. Pathological T-stage, N-stage, and ECE are strong prognostic factors. Further research is required to confirm whether adjuvant therapy adds to treatment outcomes in cases with lymphovascular invasion, perineural invasion, and depth of invasion, and help clinicians tailoring adjuvant therapy.

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References

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