1. WON is first identified using EUS, and punctured using a 19G needle. 20cc of the pancreatic fluid is aspirated and sent for CEA, amylase, cell count, gram stain and culture with sensitivities. A 0.025 or 0.035 inch guidewire is inserted into the WON through the FNA (Fine Needle Aspirate) needle. A transmural tract is created using an ERCP catheter (with the use of a needle knife catheter ± cautery if needed), and then dilated using a 12-13.5-15mm CRE balloon to a maximum size of 15mm if technically possible. Three 7Fr OR two 10Fr plastic stents are inserted through the transmural tract into the WON cavity.