**5. Classification system**

Although PPC as a term is well-established, there is no classification system widely accepted. The first classification system was proposed by D'Egidio and Schein based on the underlying etiology of pancreatitis (acute or chronic), the pancreatic ductal anatomy and the presence of communication between the cyst and the pancreatic duct [10]. Using this classification system, the cyst may be divided into three distinct types:


The latest classification system was proposed by Pan G. et al. based on the anatomical location and clinical manifestation of the pseudocysts, along with the relationship between the cyst and the pancreatic duct (**Table 1**) [11]. His aim was the selection of the optimal therapeutic approach for each stage.
