Non-functional neuroendocrine tumors of the pancreas: Advances in diagnosis and management

Figure 1 Representative images of the 5 types of pancreatic neuroendocrine tumor enhancement pattern on arterial phase computed tomography. Two images are shown for each type. A: Hyperenhancing, solid; B: Cystic with hyperenhancing rim; C: Isoenhancing or no mass visualized; D: Homogeneously hypoenhancing; E: Heterogeneous but mostly hypoenhancing with some peripheral enhancement. Groups D and E had worse survival after resection compared with groups A, B, and C (From Worhunsky et al[35]. Pancreatic neuroendocrine tumours: hypoenhancement on arterial phase computed tomography predicts biological aggressiveness. HPB 2014; 16: 304-311). Arrows indicate PNET.