Fig. 1

a A heterogeneous hypodense nodule (white arrow) is depicted at pancreatic tail in pre-contrast CT; b After contrast administration, a well-enhanced tumor with pseudocapsule (white arrow) is identified; c The nodule shows signal drop (fat) on T1 opposed phase MRI image, probably due to fatty metamorphosis (white arrow); d However, the lesion is isosignal (no water) on T2 weighted MRI image (white arrow)