Imaging pitfalls of pancreatic serous cystic neoplasm and its potential mimickers

Figure 15 A 72-year-old female with pancreatic lymphoepithelial cyst. A: Axial T2-weighted fast spin-echo magnetic resonance (MR) image with fat saturation shows a high intensity mass (arrow), which is exophytic from the neck of the pancreas (not shown); B: Axial T1-weighted gradient-echo (GRE) MR image with fat saturation shows the mass to be high intensity (arrow). Findings on T2-weighted image (Figure 14A) may mimic microcystic serous cystic neoplasm (SCN). However, the widespread distribution of high signal is somewhat unlikely for hemorrhage within microcysts of SCN because each locule should be separated by multiple septations; C: Axial diffusion-weighted MR image (b-factor = 1000) shows the mass to be high intensity (arrow), unlikely for SCN.