CD4 and neoplasm: The results showed a significant positive correlation between TLS density and tumor‐infiltrating CD4+ T cells, CD8+ T cells, CD20+ B cells and CD45RO+ memory T cells (Spearman coefficient (ρ) = 0.464, 0.486, 0.431 and 0.348; P < 0.001, < 0.001, < 0.001 and = 0.003, respectively).