Acute necrotic collection

Last revised by Jeremy Jones on 20 Sep 2021

Acute necrotic collections (ANCs) are an early, local complication of necrotizing pancreatitis.

The following are the latest terms according to the updated Atlanta classification to describe fluid collections associated with acute pancreatitis 1,2:

Acute necrotic collections develop within the first four weeks and contain a variable amount of fluid/non-liquid necrotic material. They may be pancreatic or peripancreatic in location and can be sterile or infected. 

On contrast-enhanced CT the following features are seen:

  • heterogeneous, non-liquid density collection within the pancreas and/or peripancreatic tissues
  • no defined capsule
  • no peripheral enhancement

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Cases and figures

  • Case 1
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  • Case 2
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