Fig. 3From: Common bile duct villous adenoma: a case report and review of the literatureMicroscopic examination (hematoxylin and eosin–stained slides). a General view of the tumor shows villous pattern of growth (original magnification, ×6). b Cytological details of the tumor cells: slight nuclear atypia with no invasive growth (original magnification, ×68). c Strong nuclear reaction with MSH2 immunomarker (original magnification, ×98)Back to article page