TIGAR-O System

A new classification of CP，TIGAR-O system，recommending new insights of various risk factors is close to clinical practice and gradually applied.The recent TIGAR-O system consists of six groups categorized as（1）Toxic-metabolic，（2）Idiopathic，（3）Genetic，（4）Autoimmune，（5）Recurrent and severe acute pancreatitis，or（6）Obstructive（Milosavljevic et al.2010）（Table 2.4）.

Table 2.4　TIGAR-O system of classification of chronic pancreatitis［24］

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Table2.4（continued）