Figure 1. (A) Yellowish outpouching of gallbladder body wall discovered in laparoscopic cholecystectomy (arrowhead). (B) Gross examination (arrow). (C) Histological appearance of the outpouching wall consisting of mucosa (black points), muscularis propria (red points), and adventitia (green points), confirming the diagnosis of true diverticulum. Foamy macrophage component of xanthogranulomatous inflammation within the true diverticulum (D).