<qa>  What is the primary goal of the present study?An interesting alternative endoscopic destruction would be the use of radio frequency ablation technique RFA. RFA is a recognized technique for local tumor destruction by delivering thermal energy to obtain coagulation necrosis of the lesion. Taewong Medical TM recently developed a radiofrequency needle EUSRA coupled with a combo VIVA TM generator for applying RFA sub EUS control. But no prospective study is available at this date regarding the treatment of the cystic or solid tumoral pancreatic lesion with this technique. The primary endpoint of the present study is to investigate the feasibility and safety of this guided radiofrequency probe EUS for the treatment of pancreatic endocrine tumors or inoperable pancreatic cystic tumors. The secondary objective will be the efficiency. 