Impact of periampullary diverticulum on the incidence of post-endoscopic retrograde cholangiography pancreatitis

Figure 1 Schematic diagram of periampullary diverticulum: Based on the positional relationship between periampullary diverticulum and the duodenal papilla, periampullary diverticulum is classified into two subtypes. A: The papilla is located at the edge of the diverticulum or within 2 cm of the diverticular margin; B: The papilla is situated inside the diverticulum or between two adjacent diverticula. PAD: Periampullary diverticulum.

Figure 2 Patient screening flowchart. PAD: Periampullary diverticulum; A-PAD: Type A periampullary diverticulum; B-PAD: Type B periampullary diverticulum.