Impact of histological tumor grade on the behavior and prognosis of squamous cell carcinoma of the oral cavity

J Stomatol Oral Maxillofac Surg. 2022 Nov;123(6):e808-e813. doi: 10.1016/j.jormas.2022.07.005. Epub 2022 Jul 8.

Abstract

Introduction: Unlike other types of cancers, the prognostic value of histological tumor grade is not well determined for oral squamous cell carcinoma (OSCC). This study therefore aimed to evaluate the impact of tumor differentiation on prognosis and overall survival of patients affected by squamous cell carcinoma of the oral cavity.

Materials and method: A retrospective analysis was conducted using the records of patients diagnosed with squamous cell carcinoma of the oral cavity between 2010 and 2015. The study included 162 patients treated with a tumorectomy and selective neck dissection. The influence of histological tumor grade on several prognostic factors such as T-Stage, N-stage, recurrence rate, perineural invasion, vascular invasion, surgical margins, and overall survival was analyzed.

Results: Histological grade strongly correlated with N-stage, recurrence rate, perineural invasion, vascular invasion, surgical margins, and overall survival. Overall survival was 71.6% in patients with well-differentiated tumors and 43.2% in those with moderately and poorly differentiated tumors.

Conclusions: Histological grade represents an important prognostic factor for OSCC. Therefore, various treatment strategies based on this histological parameter could improve the overall survival rate of patients affected by oral squamous cell carcinoma.

Keywords: Histological tumor grade; Oral squamous cell carcinoma; Overall survival; Prognostic factors.

MeSH terms

  • Carcinoma, Squamous Cell* / diagnosis
  • Carcinoma, Squamous Cell* / surgery
  • Head and Neck Neoplasms*
  • Humans
  • Margins of Excision
  • Mouth Neoplasms* / diagnosis
  • Mouth Neoplasms* / surgery
  • Prognosis
  • Retrospective Studies
  • Squamous Cell Carcinoma of Head and Neck