Pancreatitis on initial CT and collection 3 weeks later

Presentation:

Abdominal pain in 35 year old male. Initial CT and follow-up scan 3 weeks later are shown.

Case Discussion:

Acute pancreatitis is shown on the initial CT with pancreatic oedema and fluid tracking within the anterior pararenal space. This is subsequently complicated 3 weeks later by a large collection with areas of haemorrhage. 

This peripancreatic collection is not to be confused with pseudocyst, which occurs later than 4 weeks following pancreatitis and is more uniformly round.

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