CD8A and cervical carcinoma: The role of tumor-infiltrating B cells was studied in ovarian, lung, breast, and cervical cancers: at the tumor site, B lymphocytes can function as antigen-presenting cells to facilitate the persistence of CD8+ T lymphocytes for long periods, improve T lymphocyte responses by producing antibodies, produce cytokines to promote the organization of local lymphoid structure and change the relationship between Th1, Th2 cells.31,42,43