Cohort study based on the seventh edition of the TNM classification for gastric cancer: proposal of a new staging system.

Purpose: We investigated the effect of the new TNM classification on gastric cancer staging.

Patients And Methods: From hospital records, information from patients with gastric cancer, who had undergone either total or partial gastrectomy for adenocarcinomas of the stomach or esophagogastric junction, was retrieved. The pathologic TNM stage was determined according to the sixth and seventh editions of the International Union Against Cancer guidelines and was based on surgical pathologic examination.