Figure 4From: Carcinoma involving the gallbladder: a retrospective review of 23 cases - pitfalls in diagnosis of gallbladder carcinomaExtracellular mucin can originate from mucinous metaplasia, GBC or metastasis. A: Expansile pools of mucin with scattered glands, the mucinous epithelium exhibited cytologic atypia (H&E stain, X100), B: Neoplastic glands within the wall of gallbladder (H&E stain, X100).Back to article page