Fig 2. Immunohistochemical staining for PD-L1 in patients with non-metastastic nasopharyngeal carcinoma.
(A) A patient whose tumor was scored 1+ (weak to moderate membrane in about 5% of tumor cells) on immunohistochemical staining with PD-L1. (B) Another patient whose tumor was scored 2+ (moderate to strong membrane staining in more than 25% tumor cells) on immunohistochemical staining with PD-L1.