With a sharp needle a pseudocyst is punctured and a placement set inserted through which a double pig tail is finally placed.
The therapy depends on the extent and localisation of the pseudocyst. Firstly there is usually an observation period, because pseudocysts of the pancreas which develop during a pancreatitis often have a spontaneous remission. A complete or incomplete regression is possible, as long as the pseudocyst is not older than 6 weeks and has a diameter of less than 6 cm.
Large pseudocysts, which have not regressed after 6 weeks can be reduced via puncture. In cases of extensive size an operative revision with placement of a drain is necessary. During the operation the cyst walls are histologically examined in the frozen section to exclude a tumour of the pancreas.