Purpose of review The enthusiasm generated by the results of the Edmonton protocol of islet transplantation is inciting a great number of institutions to start such programs.However,the procedure of islet isolation and purification is costly,complex and technically challenging.In order to share costs and to avoid facing the steep learning curve of the procedure,many centers interested in islet transplantation have looked into collaborating with experienced groups serving as core islet isolation facilities.Recent findings The proof of principle that remote islet processing and shipment could be successfully implemented with obtainng the Portland/Minneapolis,Huddinge/Giessen and Houston/Miami partnerships.Moreover,in order to increase both the donor pool and the number of patients gaining access to islet transplantation,multicenter networks,such as the Swiss-French GRAGIL consortium and the 4-country Nordic Network in Scandinavia have been built.The GRAGIL group has been fully operational since 1999,allowing the transplantation of 27 islet preparations processed in Geneva,Switzerland into 20 recipients in France over the course of 4.5 years.Organizational issues in the design of such networks are discussed based on the example of the GRAGIL experience.Summary The feasibility and the efficiency of islet transplantation in multicenter networks have been demonstrated.This strategy allows to increase the donor pool and the accessibility to islet transplantation in an extended population area.(J Intervent Radiol,2006,15: 626-631) Purpose of review The enthusiasm generated by the results of the Edmonton protocol of islet transplantation is inciting a great number of institutions to start such programs. However, the procedure of islet isolation and purification is costly, complex and technically challenging.In order to share costs and to avoid facing the steep learning curve of the procedure, many centers interested in islet transplantation have looked into collaborating with experienced groups serving as core islet isolation facilities. Revenue findings The proof of principle that remote islet processing and shipment could be successfully implemented with obtainng the Portland / Minneapolis, Huddinge / Giessen and Houston / Miami partnerships. More over, in order to increase both donor populations and the number of patients gaining access to islet transplantation, multicenter networks, such as the Swiss-French GRAGIL consortium and the 4- country Nordic Network in Scandinavia have been built. The GRAGIL group has been fully operationa l since 1999, allowing the transplantation of 27 islet preparations processed in Geneva, Switzerland into 20 recipients in France over the course of 4.5 years. Organizational issues in the design of such networks are discussed based on the example of the GRAGIL experience. and the efficiency of islet transplantation in multicenter networks have been demonstrated. This strategy allows to increase the donor pool and the accessibility to is transplantation in an extended population area. (J Intervent Radiol, 2006, 15: 626-631)