Giant mucinous cystic adenoma with pancreatic atrophy mimicking dorsal agenesis of the pancreas

Figure 1 Preoperative contrast-enhanced computed tomography showing a huge cyst with septa developed close to the head of the pancreas, exophytic development to the left and downward, and rotation of the mesenteric axis. A: Axial view showing the head of the P with the intrapancreatic main bile duct (white arrowhead) and ventral pancreatic duct (yellow arrowhead). There is rotation of the mesenteric axis, as shown by the oblique plane made by the superior mesenteric artery (white arrow) and the superior mesenteric vein (yellow arrow); B: Coronal view showing thin septa within the macrocyst (white arrow) and deviation without thrombosis of the mesenterico-portal axis (red arrowhead); C: Sagittal view showing anterior development of the cyst, close to the head of the pancreas (P) and the ventral pancreatic duct (yellow arrowhead). L: Liver; S: Spleen; P: Pancreas; C: Cyst.