HP and duodenal ulcer: In fact, markedly higher prevalence of Hp among our DU patients compared with their age-matched controls as detected from gastric corpus (75 versus 50%), incisura (75.7 versus 60%), and antrum (80.3 versus 60%), as well as biopsies from any gastric location (84.9% versus 61.4%) supports previous studies indicating that more than 90% of patients with duodenal ulcer are infected with Hp [1] and provide a meaningful data on the effect of Hp on the risk of DU.