Benign gallbladder diseases: Imaging techniques and tips for differentiating with malignant gallbladder diseases

Figure 18 Xanthogranulomatous cholecystitis. A: Computed tomography scan of distended gallbladder with impacted gallstone at neck, showing segmental wall thickening of neck and proximal body and small hypodense intramural nodules (arrowheads); B: High signal intensity (arrowheads) of such abscesses or xanthogranulomas on T2-weighted image; C and D: Easily identifiable fat (arrow) within thickened wall by in-phase and opposed-phase chemical shift imaging; E and F: Mild diffusion restriction of wall thickening on diffusion-weighted imaging (E) and apparent diffusion coefficient map (F), less obvious than in gallbladder cancer.