medical illustration of ercp combined with biliary radiofrequency ablation (rfa), endoscopic retrograde cholangiopancreatography procedure, side-viewing duodenoscope inserted through mouth esophagus stomach into duodenum, catheter advanced through working channel into common bile duct, radiofrequency ablation probe with expandable electrodes positioned inside bile duct tumor, fluoroscopy c-arm in background, realistic medical illustration style, clean clinical setting, blue and white color scheme, high detail, educational diagram