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Insulinomas are the most common functioning endocrine tumors of the pancreas. Most of them are well-differentiated tumors, with benign or uncertain behavior at the time of diagnosis. Surgery is considered to be the only curative treatment modality. We present the first case report of a 75-year-old woman with functioning insulinoma of the pancreatic body, which was destroyed by laparoscopic-assisted radiofrequency ablation. Hypoglycemic paroxysms disappeared immediately after surgery. The postoperative course was uneventful. The patient was discharged on the eighth postoperative day. There was a new onset of diabetes mellitus, without any further hypoglycemic paroxysm from surgery to the present—4 months. Laparoscopic-assisted radiofrequency ablation is shown to be a feasible and safe method for the treatment of functioning pancreatic insulinoma.