Acute necrotic collection

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

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

ANCs develop within the first four weeks and contain a variable amount of fluid / non- liquid necrotic material. They may be pancreatic or peri-pancreatic 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
  • APFC: within the first week, no differentiation between between ANC and APFC may be possible

Pancreatic pathology
Share article

Article Information

rID: 35482
Section: Pathology
Synonyms or Alternate Spellings:
  • Acute necrotic collections
  • Acute necrotic collections (ANCs)
  • Acute necrotic collection (ANC)
  • Acute necrotic collection

Support Radiopaedia and see fewer ads

Cases and Figures

  • Drag
    Pancreatitis: Ini...
    Case 1
    Drag here to reorder.
  • Updating… Please wait.

    Alert accept

    Error Unable to process the form. Check for errors and try again.

    Alert accept Thank you for updating your details.