CD8A and neoplasm: TILs are immune cells isolated from tumor tissue and contain both positive regulatory immune cells, such as DCs, CD8+ T cells, and NK cells,77, 78 and negative regulatory immune cells, such as tumor‐associated macrophages (TAMs), regulatory T cells, myeloid‐derived suppressor cells (MDSCs), tumor‐associated neutrophils (TANs), and son.79, 80