The importance of adjuvant treatment and primary anatomical site in head and neck basaloid squamous cell carcinoma survival: an analysis of the National Cancer Database
Tóm tắt
Basaloid squamous cell carcinoma (BSCC) of the head and neck is an aggressive and highly malignant variant of squamous cell carcinoma that accounts for 2% of head and neck cancers. Previous studies have not analyzed the significance of adjuvant chemoradiation and anatomical site within BSCC subtype and its impact on survival. A cohort of 1999 patients with BSCC of the head and neck was formed from the National Cancer Database and analyzed with descriptive studies, median survival and 5- and 10-year survival. A multivariable Cox hazard regression was performed to determine the prognostic significance of anatomical site and adjuvant therapy. The most common primary anatomical site was the oropharynx (71.9%) followed by oral cavity (11.5%), larynx (10.1%), hypopharynx (3.5%), esophagus (1.9%), and nasopharynx (1.1%). The presence of metastasis increased the risk of mortality (HR = 2.14; 95% CI 1.40–3.26). Tumors localized to the oropharynx demonstrated better survival compared to all sites except nasopharynx, including the oral cavity (HR = 2.45; 95% CI 1.83–3.29), hypopharynx (HR = 2.58; 95% CI:1.64–4.05), and larynx (HR = 2.89; 95% CI:2.25–3.73). Adjuvant chemoradiation (HR = 0.36; 95% CI 0.23–0.58) and adjuvant radiation (HR = 0.38; 95% CI 0.23–0.64) had better survival outcomes compared to adjuvant chemotherapy. Patients with microscopic margins had better survival outcomes when compared to no surgery (HR = 0.38, 98% Cl 0.23–0.64) while there were no better survival outcomes of patients with macroscopic margins compared to no surgery. This study illustrated that tumors in the oropharynx, lower age, adjuvant chemoradiation and radiation, and microscopic margins were associated with greater survival.
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