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Many patients with primary malignant tracheal neoplasms are not surgical candidates nor do they experience residual or recurrent disease after surgery and may benefit from alternative therapies. This study explores the expression of programmed death ligand 1 (PD-L1) in patients with primary tracheal malignancy as a biomarker for candidacy for treatment with immune checkpoint inhibitors.

Programmed death ligand 1 and CD8+ immune cell infiltrates in resected primary tracheal malignant neoplasms