Cholangiocarcinoma after flow diversion surgery for congenital biliary dilatation: A case report and review of literature

Figure 4 Histological analysis of the tumor. A: Macroscopic findings; B: Hematoxylin and eosin (HE) staining, × 20; C: HE staining, ×400. Histological studies show papillary growth and fibrovascular cores in the macroscopically nodular area (yellow arrow), comprising high-grade atypical epithelial cells. There is no invasive carcinoma associated with the intraductal neoplasm.