This study is a multi-center prospective study involving four high volume international institutions. Consecutive patients suffering from pancreatic neuroendocrine tumors and pancreatic cancers would be recruited. EUS-guided RFA would be performed using a 19-gauge RFA electrode and a generator. The primary outcome would be the overall adverse events rate. Secondary outcomes include mortality, technical success rate, completion ablation rate, 1 & 3 year overall and disease-free survival.