Background: The aims of this study were to determine the recurrence rate and the prognostic factors for recurrence-free survival (RFS) in esophageal squamous cell carcinoma (ESCC) patients without lymph node metastasis (LNM).
Methods: Between January 2011 and June 2017, 101 patients with ESCC were treated and pathologically confirmed to be lymph node negative. The clinicopathological parameters were evaluated to identify the prognostic factors for RFS using Cox proportional hazards models.
Results: Nineteen out of 101 patients (18.8%) developed recurrence, and the median RFS was 41 months. The most common pattern of relapse was local recurrence (n = 11; 57.9%), followed by distant recurrence (n = 7; 36.8%); one patient developed local and distant recurrence simultaneously. The results of multivariate analysis showed that the independent prognostic factors for decreased RFS in node-negative patients were a tumor located in the upper chest (odds ratio [OR], 0.767; 95% confidence intervals (CI), 1.523-14.916, P = 0.007), the presence of lymphovascular invasion (OR, 3.534; 95% CI, 1.077-11.596, P = 0.037), and a preoperative serum carcinoembryonic antigen level ≥ 5 μg/ml (OR = 5.466; 95% CI, 1.590-18.787, P = 0.007).
Conclusions: The aforementioned parameters were the prognostic factors in node-negative ESCC patients, and they associated with a higher probability of recurrence after surgery. These patients should be followed closely, and adjuvant therapy should be considered.
Keywords: Esophageal cancer; Prognostic factor; Survival analysis.