High-definition optical magnification with digital chromoendoscopy detects gastric mucosal changes in dyspeptic-patients

Figure 1 Flowchart showing the process of classification of the study participants. NSAIDs: Nonsteroidal anti-inflammatory drugs; PPIs: Proton-pump inhibitors; Hp: Helicobacter pylori.

Figure 2 Four microvascular patterns identified by endoscopy of the gastric body mucosa. A: The type I pattern comprises a honeycomb-type subepithelial capillary network (SECN), with a regular arrangement of collecting venules and regular, round pits; B: The type IIa pattern comprises a honeycomb-type SECN with regular, round pits, but with loss of collecting venules; C: In the type IIb pattern, there is loss of the normal SECN and collecting venules, and the presence instead of enlarged white pits surrounded by erythema; D: The type III pattern is characterized by loss of the normal SECN and round pits, with irregular arrangement of the collecting venules.