Biliary casts after liver transplantation: Morphology and biochemical analysis

Figure 2 Histological and immunohistochemical examination of biliary casts. A: Histological examination of a biliary cast, showing tubiform structures (HE staining × 100); B: Histological examination of a biliary cast, showing filamentous structures (HE staining × 100); C: A biliary cast with tubiform structures positive for CD34 (brown color, × 100); D: A biliary cast with filamentous structures positive for collagen fibers (Masson staining × 100); E: A biliary cast showing peripheral positivity for neutrophils and other inflammatory cells (HE staining, × 100).