[Risk factors of recurrence and metastasis in pN1 stage squamous cell carcinoma of the thoracic esophagus after radical esophagectomy with lymphadenectomy].

Objective: To analyze the clinical and pathologic risk factors of early recurrence in patients with pathological N1 (pN1) stage esophageal squamous cell carcinoma after radical esophagectomy.

Methods: A retrospective study was carried out on 95 consecutive pN1 stage esophageal squamous cell carcinoma patients undergoing esophagectomy with lymphadenectomy by the same surgical team from January 2004 to December 2010 was performed. The Cox proportional hazards model was used to determine the independent risk factors for recurrence and metastasis within 3 years after the operation.

Results: Recurrence was identified in 52 patients (54.7%) within 3 years after operation. Local recurrence was found in 42 patients (44.2%), and distant metastasis in 10 patients (10.5%). The Cox multivariate analysis showed that pT3-4a stage (RR=3.604, P=0.027), positive lymph node metastasis in two stations (RR=4.834, P=0.009) or two fields (RR=5.689, P=0.003), and postoperative adjuvant chemotherapy (RR=1.594, P=0.048) were independent risk factors for postoperative recurrence.

Conclusions: Postoperative adjuvant chemotherapy can decrease the probability of postoperative recurrence and metastasis of pN1 esophageal squamous cell carcinoma. As for patients who are identified as multi-station or multi-field lymph node metastasis, preoperative induced therapy maybe further improve treatment outcomes.