The primary outcome of this randomized controlled trial is to compare the relapse of pain at 2 years after treatment with ESWL alone or endoscopic treatment, consisting of ESWL followed by endoscopic stone extraction. Secondary outcomes include a comparison of technical results (as assessed by abdominal CT Scan 1 week after the last intervention and secretin-enhanced magnetic resonance at 1 month), complication rates, and treatment-related costs in both groups.