In addition, the TSH‐28ζ‐CAR‐T and TSH‐BBζ‐CAR‐T cells produced substantial amounts of IFNγ and IL‐2 when coculturing with TSHR‐positive tumor cells, while no cytokines were released in the coculture with WT tumor cells (Figure 3D,E). This evidence concerns the gene IL2 and neoplasm.