Fig. 4From: T cell exhaustion is associated with the risk of papillary thyroid carcinoma and can be a predictive and sensitive biomarker for diagnosisThe T cells infiltration in thyroid by immunohistochemistry. A. PTC&noHT (100×). B. PTC&HT (100×). C. The CD3 expression in PTC&noHT (100×). D. The CD3 expression in PTC&HT (100×). E. The PD-1 expression in PTC&noHT (100×). F. The PD-1 expression in PTC&HT (100×)Back to article page