Fig. 3From: Large-cell neuroendocrine carcinoma of the common bile duct: a case report and a review of literatureFormalin-fixed surgical specimen. a The surgical specimen showed a tumor measuring 2.4 × 1.9 cm located in the mid-CBD (arrow). b The sectioned surface (at #1 and #2 of Fig. 1) of the resected specimen showed tumor invasion beyond the bile duct serosaBack to article page