CD68 and neoplasm: TLS has all the characteristics of normal lymph node formation, can produce anti‐tumor immune response, can promote T‐cell initiation, B‐cell activation and plasmocytic differentiation, is a precise factory for producing antibodies, and promotes increased cell infiltration of CD3+, CD8+, CD20 + and decreased cell infiltration of Foxp3 + and CD68 + in the tumor