Acute necrotic collection
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At the time the article was created Henry Knipe had no recorded disclosures.
View Henry Knipe's current disclosuresAt the time the article was last revised Ryan Thibodeau had no financial relationships to ineligible companies to disclose.
View Ryan Thibodeau's current disclosures- Acute necrotic collections
- Acute necrotic collections (ANCs)
- Acute necrotic collection (ANC)
- Acute necrotic collection
Acute necrotic collections (ANCs) are an early, local complication of necrotizing pancreatitis.
On this page:
Terminology
The following are the latest terms according to the updated Atlanta classification to describe fluid collections associated with acute pancreatitis 1,2:
-
fluid collections in interstitial edematous pancreatitis
acute peripancreatic fluid collections (APFC): in the first 4 weeks: non-encapsulated peripancreatic fluid collections
pseudocysts: develop after 4 weeks; encapsulated peripancreatic or remote fluid collections
-
fluid collections in necrotizing pancreatitis
acute necrotic collections (ANCs): in the first 4 weeks; non-encapsulated heterogeneous non-liquefied material
walled-off necrosis (WON or WOPN): develop after 4 weeks; encapsulated heterogeneous non-liquefied material
Pathology
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.
Radiographic features
CT
On contrast-enhanced CT the following features are seen:
-
heterogeneous, non-liquid density collection within the pancreas and/or peripancreatic tissues
fat in the collection allows the diagnosis of an ANC even on nonenhanced CT 4
no defined capsule
no peripheral enhancement
Differential diagnosis
acute peripancreatic fluid collections (APFC): within the first week, differentiation between acute necrotic collections (ANC) and APFC may prove impossible
References
- 1. Thoeni RF. The revised Atlanta classification of acute pancreatitis: its importance for the radiologist and its effect on treatment. Radiology. 2012;262 (3): 751-64. doi:10.1148/radiol.11110947 - Pubmed citation
- 2. Banks PA, Bollen TL, Dervenis C et-al. Classification of acute pancreatitis-2012: revision of the Atlanta classification and definitions by international consensus. Gut. 2012;62 (1): 102-11. doi:10.1136/gutjnl-2012-302779 - Pubmed citation
- 3. (Ed.) Choi BI. Radiology Illustrated: Hepatobiliary and Pancreatic Radiology. Springer Berlin Heidelberg. ISBN:B00HYS9FSE. Read it at Google Books - Find it at Amazon
- 4. Foster B, Jensen K, Bakis G, Shaaban A, Coakley F. Revised Atlanta Classification for Acute Pancreatitis: A Pictorial Essay. Radiographics. 2016;36(3):675-87. doi:10.1148/rg.2016150097 - Pubmed
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