Differentiating intraductal papillary mucinous neoplasms from other pancreatic cystic lesions

Figure 1 Typical computed tomography (A) and gross (B) appearance of a mucinous cystic neoplasm showing the distal location and the lack of communication with the duct, respectively.

Figure 2 Typical computed tomography (A) and gross (B) appearance of a small pancreatic pseudocyst showing the typical spheroid shape, unilocularity, and necrotic debris contents.

Figure 3 Typical computed tomography (A) and gross (B) appearance of a solid pseudopapillary neoplasm showing the typical ovoid shape and necrotic debris contents.

Figure 4 Typical computed tomography (A) and gross (B) appearance of a serous cystadenoma showing the honeycomb appearance.

Figure 5 Typical computed tomography (A) and gross (B) appearance of a cystic neuroendocrine tumor showing the spherical shape and the occasionally seen calcification.

Figure 6 Typical computed tomography (A) and gross (B) appearance of an intraductal papillary mucinous neoplasm showing the ovoid shape and communication with the duct, respectively.

Figure 7 Typical computed tomography (A) and gross (B) appearance of a lymphoepithelial cyst showing the typical ovoid shape, peripheral location, and proteinaceous concretions (not always present on computed tomography imaging).

Figure 8 Typical computed tomography (A) and gross (B) appearance of an invasive carcinoma with cystic degeneration.