“…The macroscopic classification of the gastric cancers was based on the general rules for Gastric Cancer Study in Japan (Japanese Research Society for Gastric Cancer, 1981a). Histopathological examinations were performed on the primary lesions with step sections to determine the depth of cancer invasion, and on the resected lymph nodes by using three central sections to (Gehan, 1965). Other statistical analyses were performed by the chi-square test.…”