Most patients with chronic duodenal ulcer (DU) craters have gastritis associated with
Helicobacter pylori (HP), now thought to be the major cause of DU. A smaller proportion of …

Abstract purpose, patients, and methods: Helicobacter pylori (HP) is present in more than
90% of duodenal ulcers (DUs). To investigate the pathophysiology in those patients with DU …

Aliment Pharmacol Ther 30, 791–815 Summary Background Helicobacter pylori infection
rates in duodenal ulcer (DU) patients may be lower than previously estimated. Aim To …

Causes of < em> Helicobacter pylori</em>(HP)-negative gastric ulcers (GUs) have
not previously been systematically studied. In this study we examined possible causes of HP …

It is unclear whether Helicobacter pylori infection is essential to the development of peptic
ulcers. In this study, we examined the rates of H. pylori-negativity among patients with peptic …

The prevalence of H. pylori infection has beenreported to be very high in duodenal ulcer
(DU) disease, but the precise frequency and causes of H. pylori-negative DU are not well …

METHODS: Patients with an endoscopic diagnosis of duodenal ulcer between 1996 and
2002 were included in the present study. Patients were considered to be negative for H …

OBJECTIVE: The proportion of Helicobacter pylori–negative duodenal ulcer disease
appears to be increasing. Data on clinical outcome and prognosis in this subgroup are …

Objective: To identify demographic and endoscopic characteristics of patients with
Helicobacter pylori positive and negative chronic peptic ulcer disease. Design: Cross …

Most patients with chronic duodenal ulcer disease have Helicobacter pylori infection and
eradicating it considerably reduces the relapse rate. The prevalence of H pylori in 80 …