CD19 and neoplasm: Subsequently, these iPSCs were further transduced with a lentivirus carrying CD19 CAR and ultimately directed differentiation toward CD19 CAR‐T cells through a specialized 3D‐organoid culture system.[86] Moreover, the iPSC‐derived CD19 CAR‐T cells exhibited robust in vivo antitumor efficacy, prolonging the survival of mice harboring CD19+ human tumor xenografts.