CD4 and nasopharyngeal carcinoma: In nasopharyngeal carcinoma patients, the infiltration of immune cells (B naïve cells, B memory cells, CD8T, CD4 memory T activated, T gamma delta, Mast cells resting, and activated Mast cells) is significantly increased and the infiltration of immune cells (CD4 memory T resting, Macrophages M0, and Macrophages M2) is significantly decreased in the high risk score group compared to low risk score group.