Safety and Feasibility of Gastrectomy in Super Elderly Patients (Aged ≥ 80): A Propensity Score-Matched Analysis

Introduction: The benefits of gastrectomy in elderly patients with gastric cancer (GC) remain unknown. This study was conducted to evaluate the short-and long-term outcomes of elderly patients with GC (>= 80 years) who underwent gastrectomy.Methods: We enrolled 479 patients (Stages I-IV) who underwent gastrectomy with R0-1 resection. The patients were divided into an elderly group (E group; age >= 80 years) (n = 115) and a non-elderly group (NE group; age < 80 years) (n = 364). After propensity score matching (PSM) was performed, the short-and long-term outcomes were compared between the groups.Results: The rate of postoperative complications (Clavien-Dindo classification >= IIIa) in the two groups did not differ significantly (p = 0.657). Before PSM, the five-year overall survival (OS, 35.3% vs. 71.7%, p < 0.001) and disease-specific survival (DSS, 56.8% vs. 81.8%, p < 0.001) in the E group were significantly shorter than that in the NE group, respectively. On the other hand, significant differences between the E and NE groups were not shown in either the five-year OS (35.5% vs. 50.8%, p = 0.0985) or the five-year DSS (56.5% vs. 66.9%, p = 0.274) after PSM.Conclusion: Gastrectomy for elderly patients with GC can be considered safe based on short-term outcomes. In terms of long-term results, elderly patients are not inferior to non-elderly patients if the patients' backgrounds are the same. On the other hand, the long-term outcomes of elderly GC patients who have various comorbidities are not satisfactory, so we should carefully consider the indications for gastrectomy.