Extra-perigastric Extranodal Metastasis is a Significant Prognostic Factor in Node-Positive Gastric Cancer

Background Extranodal metastasis is an isolated tumor nodule without a residual lymph node structure and has been reported as a poor prognostic factor in gastric cancer. The aim of this study is to assess the prognostic value of extranodal metastasis, especially from the viewpoint of its anatomical distribution. Methods A total of 139 consecutive gastric cancer patients who underwent curative surgery with lymph node metastasis between 2008 and...