Endoscopic foregut surgery and interventions: The future is now. The state-of-the-art and my personal journey

Figure 13 Photodynamic therapy in a patient with Barrett’s esophagus and high grade dysplasia, performed by Dr. Chang and assistant (who consented to publishing this figure); photo taken in 1997. A: Endoscopic image of 4 cm Barrett’s esophagus (BE) with high grade dysplasia (HGD); B: Photoactivation of photofrin with 630 nm diffuser fiber; C: Room view of diffuser fiber advanced through endoscope; D: Forty-eight hours post photodynamic therapy - endoscopic view of mucosal necrosis; E: Complete eradication of BE and HGD with mild stricture.