on the basis of our results , different populations of gastric ulcer patients seem to be identifiable : ( 1 ) young patients ( aged under 40 ) , with low prevalence and recurrence rates , with acid capacity above normal range , high peptic activity and no risk for precancerous or neoplastic changes , ( 2 ) middleaged subjects ( 41-50 ) , with high prevalence and recurrence rates , high peptic activity and acid activity within the normal range , atrophic gastritis , intestinal metaplasia , dysplasia and low incidence of cancer , and ( 3 ) elderly patients ( aged over 50 ) , with lower prevalence and recurrence rates , frequent association with chronic atrophic gastritis , impaired acid and peptic secretion , in whom one may observe either an association of the ulceration with cancer or evolution of dysplasia into neoplasia .
C0006826
cancer
C0027651
neoplasia