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

Figure 15  Mucinous cystic neoplasm with “cyst-within-cyst” architecture. A and B: Coronal and axial single-shot T2-weighted images show a well-defined cystic lesion containing multiple internal cystic components with heterogeneous fluid signal; C: Thick-slab magnetic resonance cholangiopancreatography demonstrates a normal-caliber main pancreatic duct without communication with the cystic lesion; D: Axial T1-weighted image confirms intracystic heterogeneity, with focal hyperintense areas suggestive of hemorrhagic or proteinaceous content; E and F: Post-contrast axial T1-weighted images show minimal enhancement of the thin intracystic septa; G: Non-contrast computed tomography demonstrates peripheral (mural) and intraseptal calcifications. The “cyst-within-cyst” appearance may enter the differential diagnosis with hydatid cyst.