Background: Neoadjuvant therapy followed by surgery is recommended for locally advanced esophageal cancer. With the inaccuracies of clinical staging particularly for cT1N+ and cT2Nany tumors, some have proposed consideration of surgery followed by adjuvant treatment. Our objective is to evaluate the efficacy of neoadjuvant therapy vs surgery followed by adjuvant therapy, and to identify the ideal sequence of treatment in patients with cT1N+ and cT2Nany tumors.
Methods: We performed an analysis utilizing the National Cancer Database (2006-2015) identifying all patients with cT1N+ and cT2Nany esophageal cancer undergoing esophagectomy. The treatment was stratified as: neoadjuvant therapy (NT), adjuvant therapy (AT) and combination therapy of neoadjuvant and adjuvant (CT) groups and outcomes were analyzed.
Results: We identified 2795 patients with 81.9% (n=2289) receiving NT, 10.2% (n=285) AT, and 7.9% (n=221) CT. There were no significant differences noted in survival among AT, NT, and CT group in cT1N+(P=0.376), cT2N-(P=0.436), cT2N+(P=0.261) esophageal cancer by multivariate analysis using Cox regression model. This relationship held true in both squamous cell carcinoma and adenocarcinoma.
Conclusion: In clinical T1N+, T2Nany patients, there was no evident superiority of NT over AT. Surgery followed by adjuvant therapy can be considered to be an alternative option in these patients. Further prospective studies are needed to validate these findings.
Keywords: Adjuvant therapy; Esophageal cancer; National Cancer Database Analysis of Esophageal Cancer; Neoadjuvant therapy.
© 2021. The Author(s).