LAUSR

including T and N stages were balanced between the two groups. However, tumor size was larger (22.9 7.5mm versus 26.8 12.4mm; p=0.018) and number of harvested lymph nodes was higher (13.2 7.5 versus 21.9 11.3; p< 0.001) in the PD group. The 5-year overall survival rates of the SR and PD groups were 41.5% and 52.6%, respectively (p=0.023) and the 5-year disease-free survival rates of the SR and PD groups were 37.5% and 57.6% (p=0.047). The pattern of recurrence was not different while the number of recurred patients was higher in the SR group (p=0.042). Lymph node metastasis was an independent prognostic factor, whereas the operative procedure itself was not. Conclusion: PD is recommended in EHCCC for better oncologic outcomes. And in patients underwent SR due to poor general performance, more aggressive nodal dissection is required for accurate staging and improved outcome.