Is neoadjuvant therapy beneficial in clinically staged T2N0 esophageal cancer?
135 Background: The optimal treatment strategy for clinical stage T2N0 (cT2N0) esophageal cancer is poorly defined. The specific aims of this analysis were to determine the impact of neoadjuvant therapy (NAT) in cT2N0 esophageal cancer patients on overall survival, nodal metastasis, staging, and pathological complete responders (pCR) NAT. Methods: We reviewed a retrospective cohort of 27 patients with cT2N0 esophageal cancer at Oregon Health & Science University, an NCI-Designated Cancer Center from 1999 to 2011. All patients were staged pre-operatively using Endoscopic Ultrasound (EUS), CT +/- FDG-PET. Patients were identified into two cohorts: NAT followed by surgery and surgery alone. We compared overall survival between the cohorts using Kaplan-Meier analysis. Results: Eleven patients (41%) received NAT followed by surgery and sixteen patients (59%) underwent surgery alone. Minimal invasive esophagectomy and decreased length of stay (p < 0.05) were associated with the presence of neoadjuvant therapy. The difference in overall survival rate was not statistically significant between NAT and surgery alone groups (p = 0.96). Three of 11 patients (27%) had a pCR and 8 (73%) were partial or non responders after NAT. In the surgery only group, nine of 16 patients (56%) were understaged, 6 (38%) were overstaged and 1 (6%) was correctly staged. Despite being clinically node negative, 14/27 (52%) had node positive disease in both groups with 5/11 (45%) in NAT group and 9/16 (56%) in surgery group. Conclusions: The benefit of NAT in cT2N0 esophageal cancer patients remains unclear. However, our finding of significant clinical understaging and frequent positive nodes in clinically node negative patients suggests a clinical benefit to NAT for some cT2N0 patients before surgery. These observations support design of a prospective clinical trial to define the role of NAT in patients with cT2N0 esophageal cancer.