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

Figure 4 Atypical unilocular intraductal papillary mucinous neoplasm. A: Thick-slab magnetic resonance cholangiopancreatography demonstrates a predominantly unilocular cystic lesion with subtle caudal septations located adjacent to the main pancreatic duct. This appearance may mimic a mucinous cystic neoplasm, posing a diagnostic challenge; B: Axial single-shot T2-weighted image shows segmental dilatation of the main pancreatic duct in the isthmus and body, with preserved upstream ductal caliber; C: Thin-slab magnetic resonance cholangiopancreatography confirms direct communication between the cystic lesion and the main pancreatic duct (arrow), establishing the diagnosis of intraductal papillary mucinous neoplasm.