Common cystic pancreatic neoplasms: A comprehensive magnetic resonance imaging-based review of typical and atypical imaging features

Figure 9 Solid serous cystic neoplasm. A and B: Contrast-enhanced computed tomography shows a well-defined hypervascular lesion in the pancreatic head with arterial phase hyperenhancement and portal venous phase isointensity, measuring approximately 2 cm; C: Axial single-shot T2-weighted image represents a reference example of the typical magnetic resonance appearance of serous cystic neoplasm; D: Axial single-shot T2-weighted image demonstrates a moderately and heterogeneously hyperintense lesion; E: Axial T1-weighted image shows low signal intensity; F and G: Diffusion weighted imaging (b = 1000 second/mm²) shows high signal intensity due to T2 shine-through, without true diffusion restriction, as confirmed on apparent diffusion coefficient map, which demonstrates no signal drop, with isointense signal indicating absence of true restriction (arrow). This appearance may mimic a pancreatic neuroendocrine tumor.