 Primary, to determine whether staining of the gastric mucosa increases the number of detected premalignant foci of diffuse type gastric cancer, in individuals from families with FDGC as well as dysplastic, adenomatous and early intestinal cancers in individuals from families with FIGC. Secondary: A To determine the optimal pathological work-up the detection rate of pre-malignancy. B To determine clinical and life style factors that are associated with the two types of FGC. C To determine the psychosocial impact of the screening protocol in this population. D To develop a strategy for screening individuals from FGC families and creative advise for preventive measures. 