A case of long survival in poorly differentiated small cell carcinoma of the pancreas

Figure 1 A: Abdominal computed tomography in the arterial phase shows poorly demarcated mass compressing CBD (black arrow); B: In delayed phase, mass (white arrows) at the pancreatic head revealed with relatively well delineated margin.

Figure 2 Magnetic resonance cholangiopancreatography (MRCP) shows abrupt narrowing of the distal common bile duct and mild dilatation of pancreatic duct.

Figure 3 Gross appearance of the specimen shows a tumor nodule 2 cm in diameter at the head of the pancreas.

Figure 4 A: The tumor consisted of small round or oval cells with hyperchromatic nuclei and scant cytoplasm; B and C: Immunohistochemical staining for CD56 (B) and synaptophysin (C) reveals a positive reaction.