Retrospective evaluation of lymphatic and blood vessel invasion and Borrmann types in advanced proximal gastric cancer.

BACKGROUND The Borrmann classification system is used to describe the macroscopic appearance of advanced gastric cancer, and Borrmann type IV disease is independently associated with a poor prognosis. AIM To evaluate the prognostic significance of lymphatic and/or blood vessel invasion (LBVI) combined with the Borrmann type in advanced proximal gastric cancer (APGC). METHODS The clinicopathological and survival data of 440 patients with APGC who underwent curative surgery between 2005 and 2012 were retrospectively analyzed. RESULTS In these 440 patients, LBVI+ status was associated with Borrmann type IV, low histological grade, large tumor size, and advanced pT and pN status. The 5-year survival rate of LBVI+ patients was significantly lower than that of LBVI-patients, although LBVI was not an independent prognostic factor in the multivariate analysis. No significant difference in the prognosis of patients with Borrmann type III/LBVI+ disease and patients with Borrmann type IV disease was observed. Therefore, we proposed a revised Borrmann type IV (r-Bor IV) as Borrmann type III plus LBVI+, and found that r-Bor IV was associated with poor prognosis in patients with APGC, which outweighed the prognostic significance of pT status. CONCLUSION LBVI is related to the prognosis of APGC, but is not an independent prognostic factor. LBVI status can be used to differentiate Borrmann types III and IV, and the same approach can be used to treat r-Bor IV and Borrmann type IV.