CD4 and squamous cell carcinoma: In addition, in the analysis of TIICs in 1290 patients with squamous cell carcinoma, immature B cells, CD4+ T cells, CD8+ T cells, mast cells, follicular helper T cells, M1 macrophages, M0 macrophages, neutrophils, eosinophils have certain clinical value for the prognosis of squamous cell carcinoma [178].