PD-1, PD-L1, NY-ESO-1, and MAGE-A4 expression in cutaneous angiosarcoma: A case report.

Histopathology of the excised specimen was positive for programmed cell death 1, programmed cell death ligand-1, New York esophageal squamous cell carcinoma-1, and melanoma-associated antigen 4; their expression may be a therapeutic target for cAS. Combining immunotherapy with surgical treatment may be effective for cAS.