Imaging pitfalls of pancreatic serous cystic neoplasm and its potential mimickers

Figure 4 A 64-year-old female with mixed microcystic and solid-appearing serous cystic neoplasm. A: The pancreatic parenchymal phase of an axial contrast enhanced-computed tomography (CT) shows a large enhancing mass in the pancreatic body. The right side of the tumor shows avid arterial enhancement (arrow), and the left side is low density (arrowheads); B: Magnetic resonance cholangiopancreatography shows a microcystic component at the left side of the tumor (arrowhead) that corresponds to the low density area on CT. In contrast, the right side of the tumor is radiologically solid-appearing (arrow); C: Microscopic view of the left side of the tumor [microcystic component (arrowheads in A and B)] consists of various sizes of small cystic spaces; D: Microscopic view of the right side of the tumor [solid-appearing component (arrows in A and B)] consists of smaller sized microcysts. It is radiologically solid-appearing but histologically microcystic.