Endoscopic findings of the gastric mucosa during long-term use of proton pump inhibitor - a multicenter study.

BACKGROUND AND AIM: It is clinically important to diagnose drug-induced gastric lesions correctly. Recently, the use of proton pump inhibitors (PPI) has increased worldwide. The histological features induced by PPI have been reported; however, few reports have described endoscopic findings induced by PPI. Therefore, we aimed to clarify the characteristic endoscopic features in PPI users and associated pathogenic factors.

METHODS

We prospectively registered 1007 consecutive participants (70 PPI users and 937 nonusers) who underwent endoscopic examination for cancer screening in three hospitals/clinics. Clinical data and endoscopic findings were recorded in the registration forms. We compared the endoscopic features between the two groups and evaluated contributing factors via univariate and multivariate analyses.

RESULTS

Multiple white elevated lesions (MWEL) and cobblestone-like mucosa (CLM) were more commonly observed in PPI users compared with nonusers (p < .01). Foveolar hyperplastic polyps were also frequently observed in PPI users but were not statistically significantly different (p = .06). MWEL and CLM were more frequently observed in older patients than in younger patients. MWEL was more frequently observed in female patients than in male patients; however, CLM was predominantly observed in male patients.

CONCLUSION

MWEL and CLM are characteristic endoscopic features in PPI users. A gender-associated difference was noted in terms of the frequency of these lesions.