Infected pancreatic necrosis: Not necessarily a late event in acute pancreatitis

Table 2 The new classification of severity of acute pancreatitis (Modified from[2])

Severity category	Local determinants		Systemic determinants
Mild	No (peri)pancreatic necrosis	and	No organ failure
Moderate1	Sterile (peri)pancreatic necrosis	or	Transient organ failure
Severe1	Infected (peri)pancreatic necrosis	or	Persistent organ failure
Critical	Infected (peri)pancreatic necrosis	and	Persistent organ failure

¹Severity is graded on the basis of more severe local or systemic determinants (e.g. sterile pancreatic necrosis without organ failure has to be graded as moderate; sterile pancreatic necrosis with persistent organ failure has to be graded as severe).