Endosonography guided management of pancreatic fluid collections

Table 1 Revised Atlanta classification (2012) of pancreatic/peripancreatic fluid collections

Type of pancreatic or peripancreatic fluid collection	Etiology	Capsule	Specific features
Acute peripancreatic fluid collection, APFC	≤ 4 wk after onset of acute interstitial-edematous pancreatitis	-	Homogeneous, liquid, infection +/-, no features of a pseudocyst, usually resolves spontaneously
Pancreatic pseudocyst, PPC	> 4 wk after onset of acute interstitial-edematous pancreatitis	+	Round/oval, Liquid, no non-liquid contents, persistent
Acute necrotic collection, ANC	Acute necrotizing pancreatitis	-	Heterogeneous, liquid and necrotic contents, usually resolves spontaneously
Walled-off pancreatic necrosis, WOPN	> 4 wk after onset of necrotizing pancreatitis	+	Heterogeneous, liquid and necrotic contents, infection +/-

ANC: Acute necrotic collection.