Despite use of the currently most effective treatment regimens, approximately 10% to 20% of patients will fail to achieve eradication of their infection, and thus will remain H pylori positive.

These findings are suggestive but not diagnostic of H. pylori infection. Magnifying endoscopy can reveal more precisely the abnormal mucosal patterns in an H. pylori-infected stomach; however ...

Three of four patients with H. pylori gastritis had irregular mucosa ... NBI endoscopy in the diagnosis of non-neoplastic gastric pathology.