Validation of the eighth edition AJCC staging system in early T1 to T2 oral squamous cell carcinoma

Samskruthi Murthy, Tsu-Hui (Hubert) Low, Narayana Subramaniam, Deepak Balasubramanian, Vidhyadharan Sivakumaran, Adharsh Anand, Smitha Nalumackal Vijayan, Ajit Nambiar, Krishnakumar Thankappan, Subramania Iyer

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Abstract

Background: To validate the newly proposed American Joint Committee on Cancer (AJCC) eighth edition staging in early T1 and T2 oral cavity cancers and its effect in predicting tumour control. Methods: Retrospective analysis of treatment outcomes of 441 T1 to T2 oral squamous cell carcinoma (OSCC). Overall survival (OS), disease‐specific survival (DSS), and tumour control were calculated and compared between the AJCC 7 and 8 staging systems. Results: The 5‐year OS was 78% and 61% for T1 and T2 tumours, respetively (P < 0.001) (AJCC 7) vs 87% and 67% (P < 0.001) (AJCC 8). The 5‐year DSS was 78% and 61% for T1 and T2, respectively (P < 0.001) (AJCC 7) vs 89% and 71% (P < 0.001) (AJCC 8). For stages I and II tumours the 5‐year OS was 81% and 76%, respectively (P < 0.302) (AJCC 7) vs 87% and 73% (P < 0.017) (AJCC 8). The 5‐year DSS was 83% and 82% (P < 0.222) vs 89% and 77% (P < 0.016). With the AJCC eighth edition the 5‐year local, regional, and distant control rates for T1 vs T2 tumours were 85% vs 74% (P = 0.003), 95% vs 77% (P = 0.001), and 95% vs 80% (P = 0.014), respectively. Conclusion: The AJCC 8th staging system provided for more accurate prediction of OS, DSS, and disease control in early oral cavity cancers.
Original languageEnglish
Pages (from-to)449-454
Number of pages6
JournalJournal of Surgical Oncology
Volume119
Issue number4
DOIs
Publication statusPublished - Mar 2019
Externally publishedYes

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Keywords

  • American Joint Committee for Cancer 8
  • depth of invasion
  • squamous cell carcinoma
  • tongue cancer

Cite this

Murthy, S., Low, T-H. H., Subramaniam, N., Balasubramanian, D., Sivakumaran, V., Anand, A., ... Iyer, S. (2019). Validation of the eighth edition AJCC staging system in early T1 to T2 oral squamous cell carcinoma. Journal of Surgical Oncology, 119(4), 449-454. https://doi.org/10.1002/jso.25348