Acute necrotic collection
Updates to Article Attributes
Body
was changed:
Acute necrotic collections (ANCs) are an early, local complication of of necrotising pancreatitis.
Terminology
The following are the latest terms according to the updated Atlanta classification to describe fluid collections associated with acute pancreatitis1,2:
- fluid collections ininterstitial oedematous pancreatitis
-
acute
peripancreaticperipancreatic fluidcollectionscollections (APFC): in the first 4 weeks: non-encapsulated peripancreatic fluid collections -
pseudocysts: develop
afterafter 4 weeks; encapsulated peripancreatic or remote fluid collections
-
acute
- fluid collections innecrotising pancreatitis
-
acute
necrotic collectionsnecrotic collections (ANCs): in the first 4 weeks; non-encapsulatedheterogeneousheterogeneous non-liquefied material -
walled-off necrosis (WON
or WOPNor WOPN): developafterafter 4 weeks; encapsulated heterogeneous non-liquefied material
-
acute
Pathology
ANCsAcute necrotic collections develop within the first four weeks and contain a variable amount of fluid / non- liquid necrotic/non-liquid necrotic material. They may be be pancreatic or peri-pancreaticperipancreatic in location and can be 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
- no defined capsule
- no peripheral enhancement
Differential diagnosis
-
APFCacute peripancreatic fluid collections (APFC): within the first week,nodifferentiation betweenbetween ANCacute necrotic collections (ANC) and APFC maybe possibleprove impossible
-<p><strong>Acute necrotic collections</strong> (<strong>ANCs</strong>) are an early, local complication of <a href="/articles/necrotising-pancreatitis">necrotising pancreatitis</a>.</p><h4>Terminology</h4><p>The following are the latest terms according to the updated <a href="/articles/international-multidisciplinary-classification-of-acute-pancreatitis-severity">Atlanta classification</a> to describe fluid collections associated with acute pancreatitis <sup>1,2</sup>:</p><ul>-<li>fluid collections in <a href="/articles/interstitial-oedematous-pancreatitis">interstitial oedematous pancreatitis</a><ul>- +<p><strong>Acute necrotic collections</strong> (<strong>ANCs</strong>) are an early, local complication of <a href="/articles/necrotising-pancreatitis">necrotising pancreatitis</a>.</p><h4>Terminology</h4><p>The following are the latest terms according to the updated <a href="/articles/revised-atlanta-classification-of-acute-pancreatitis-1">Atlanta classification</a> to describe fluid collections associated with acute pancreatitis <sup>1,2</sup>:</p><ul>
- +<li>fluid collections in <a href="/articles/interstitial-oedematous-pancreatitis">interstitial oedematous pancreatitis</a><ul>
-<a href="/articles/acute-peripancreatic-fluid-collection">acute peripancreatic fluid collections</a> (APFC): in the first 4 weeks: non-encapsulated peripancreatic fluid collections</li>- +<a href="/articles/acute-peripancreatic-fluid-collection">acute peripancreatic fluid collections</a> (APFC): in the first 4 weeks: non-encapsulated peripancreatic fluid collections</li>
-<a href="/articles/pancreatic-pseudocyst-1">pseudocysts</a>: develop after 4 weeks; encapsulated peripancreatic or remote fluid collections</li>- +<a href="/articles/pancreatic-pseudocyst-1">pseudocysts</a>: develop after 4 weeks; encapsulated peripancreatic or remote fluid collections</li>
-<li>fluid collections in <a href="/articles/necrotising-pancreatitis">necrotising pancreatitis</a><ul>- +<li>fluid collections in <a href="/articles/necrotising-pancreatitis">necrotising pancreatitis</a><ul>
-<a href="/articles/acute-necrotic-collection">acute necrotic collections</a> (ANCs): in the first 4 weeks; non-encapsulated heterogeneous non-liquefied material</li>- +<a href="/articles/acute-necrotic-collection">acute necrotic collections</a> (ANCs): in the first 4 weeks; non-encapsulated heterogeneous non-liquefied material</li>
-<a href="/articles/walled-off-pancreatic-necrosis-1">walled-off necrosis</a> (WON or WOPN): develop after 4 weeks; encapsulated heterogeneous non-liquefied material </li>- +<a href="/articles/walled-off-pancreatic-necrosis-1">walled-off necrosis</a> (WON or WOPN): develop after 4 weeks; encapsulated heterogeneous non-liquefied material </li>
-</ul><h4>Pathology</h4><p>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. </p><h4>Radiographic features</h4><h5>CT</h5><p>On contrast-enhanced CT the following features are seen:</p><ul>- +</ul><h4>Pathology</h4><p>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. </p><h4>Radiographic features</h4><h5>CT</h5><p>On contrast-enhanced CT the following features are seen:</p><ul>
-<a href="/articles/acute-peripancreatic-fluid-collection">APFC</a>: within the first week, no differentiation between between ANC and APFC may be possible</li></ul>- +<a href="/articles/acute-peripancreatic-fluid-collection">acute peripancreatic fluid collections</a> (APFC): within the first week, differentiation between acute necrotic collections (ANC) and APFC may prove impossible</li></ul>
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