FIGURE 3. Photodynamic therapy (PDT) of an extrahepatic cholangiocarcinoma using a digital cholangioscopy to deliver the laser: A) cholangioscopic identification of the neoplastic stricture; B) placement of the lighting catheter across the neoplastic stricture; C) fluoroscopic control of the PDT catheter positioning; D) cholangioscopic appearance during lighting; E) repositioning of the fiber after the first lighting; F) final fluoroscopic control after the PDT session and plastic stenting.