Association of Collagenous Gastritis With Helicobacter pylori Infection.

is the most common infection and is mostly asymptomatic in infected individuals. Only a few cases of collagenous gastritis associated with infection have been reported in the previous literature. We report a case of a 54-year-old female presenting with heartburn and epigastric pain associated with bloating, gas, and sometimes constipation. The physical examination was unremarkable with a soft, non-tender, and non-distended abdomen. Upper endoscopy showed erythema in the stomach with non-erosive gastritis. Our patient was diagnosed with -associated chronic active gastritis with collagenous gastritis on histologic evaluation of the gastric biopsy specimen. After treatment with eradication therapy, patients with collagenous gastritis associated with infections showed a significant improvement in collagenous gastritis on endoscopy.