<prompt> A mature, encapsulated collection of pancreatic andor peripancreatic necrosis that has developed a well defined inflammatory wall is best known as:WOPN walled-off Pancreatic necrosisPseudocystPancreatic abscessCystic neoplasm of pancreas  <response>: WOPN walled-off pancreatic necrosis A mature, encapsulated collection of pancreatic andor peripancreatic necrosis with a well defined inflammatory wall. WOPN usually occurs 4 weeks after onset of necrotising pancreatitis. CECT criteria Heterogeneous with liquid and non-liquid density with varying degrees of loculations Well defined wall, that is, completely encapsulated Ref:Gut 2013;62:102-111. doi:10.1136gutjnl-2012-302779. 