Satisfactory surgical outcome of T2 gastric cancer after modified D2 lymphadenectomy

Objective: Though D2 lymphadenectomy has been increasingly regarded as standard surgical procedure for advanced gastric cancer(GC), the modified D2(D1 + 7, 8a and 9) lymphadenectomy may be more suitable than D2 dissection for T2 stage GC. The purpose of this study is to elucidate whether the surgical outcome of modified D2 lymphadenectomy was comparable to that of standard D2 dissection in T2 stage GC patients.Methods: A retrospective cohort study with 77 cases and 77 controls matched for baseline characteristics was conducted. Patients were categorized into two groups according to the extent of lymphadenectomy: the modified D2 group(m D2) and the standard D2 group(D2). Surgical outcome and recurrence date were compared between the two groups.Results: The 5-year overall survival(OS) rate was 71.4% for patients accepted m D2 lymphadenectomy and70.1% for those accepted standard D2, respectively, and the difference was not statistically significant. Multivariate survival analysis revealed that curability, tumor size, TNM stage and postoperative complications were independently prognostic factors for T2 stage GC patients. Patients in the m D2 group tended to have less intraoperative blood loss(P=0.001) and shorter operation time(P<0.001) than those in the D2 group. While there were no significant differences in recurrence rate and types, especially lymph node recurrence, between the two groups.Conclusions: The surgical outcome of m D2 lymphadenectomy was equal to that of standard D2, and the use of m D2 instead of standard D2 can be a better option for T2 stage GC.