Fig. 6From: T cell exhaustion is associated with the risk of papillary thyroid carcinoma and can be a predictive and sensitive biomarker for diagnosisImmunohistochemical results of PD-L1 expression in NG&noHT, NG&HT, PTC&noHT and PTC&HT tissue samples. Immunopositivity scores were classified as follows: 3+ (a score of 3), 2+ (a score of 2), 1+ (a score of 1), and negative (a score of 0) (*P < 0.05)Back to article page