2. A 0.025 or 0.035 inch guidewire is inserted into the WON through the FNA needle. A transmural tract is created using ERCP dilation catheters or electrocautery devices ( needle knife catheter or Hot Axios cautery if needed) as described below. The catheter-based stent delivery system with a 15mm AXIOS stent mounted onto it is inserted into the endoscope, and introduced into the WON cavity either: 1) after dilation with endoscopic dilators (4-5-7 French/5-7-10 French push dilators, 4mm, or 6mm balloons) or 2) using electrocautery mounted on the stent system ("Hot Axios"). The stent should be positioned so that it lies within both the WON and enteric lumen. The stent is then deployed so that one flange of the stent is located within the WON cavity and the other flange is located within the enteric lumen. The Axios stent is then dilated to at least 13.5-15mm following deployment using a 12-15mm balloon.