PD-L1 positive squamous cell carcinoma of esophagus

PD-L1 positive squamous cell carcinoma of the esophagus is a malignant epithelial neoplasm arising from the mucosal lining of the esophagus, characterized by the histological features of squamous differentiation and the immunohistochemical expression of programmed death-ligand 1 (PD-L1) Pathophysiologically, the tumor's expression of PD-L1 enables immune evasion by binding to PD-1 receptors on cytotoxic T cells to inhibit host antitumor immune responses, a feature that identifies patients likely...

PD-L1 positive squamous cell carcinoma of the esophagus is a malignant epithelial neoplasm arising from the mucosal lining of the esophagus, characterized by the histological features of squamous differentiation and the immunohistochemical expression of programmed death-ligand 1 (PD-L1)

It affects the upper gastrointestinal tract and represents a biomarker-defined subgroup of esophageal cancer commonly evaluated by tumor proportion score or combined positive score

Clinically, it typically presents with progressive dysphagia, odynophagia, and involuntary weight loss, often demonstrating aggressive local invasion and a propensity for regional lymph node metastasis

Clinically, it typically presents with progressive dysphagia, odynophagia, and involuntary weight loss, often demonstrating aggressive local invasion and a propensity for regional lymph node metastasis