Depth-oriented organ-preserving salvage endoscopic strategy with argon plasma coagulation and photodynamic therapy for residual or recurrent esophageal squamous cell carcinoma after chemoradiotherapy.

Key Points

• The aim is to evaluate a tailored endoscopic strategy for treating residual or recurrent esophageal squamous cell carcinoma after chemoradiotherapy.
• Utilized argon plasma coagulation (APC) for cases classified as ycT1a.
• Employed photodynamic therapy (PDT) for cases categorized as ycT1b-T2.
• Adapted treatment strategy based on tumor invasion depth.
• Demonstrated feasibility and safety of the endoscopic strategy.
• Effectively controlled local disease in residual or recurrent cases.
• Facilitated organ preservation in selected patients.