Most engineered CAR-NK cells are directed against blood-related malignancies, such as CD19 for B cell lymphomas, CD22 for refractory B-cell lymphomas and solid tumors, NKG2D-ligand for pancreatic cancers, and CD33 and ROBO1 specific BiCAR-NK/T for malignant and metastatic solid tumors (107). The gene discussed is KLRK1; the disease is B-cell non-Hodgkin lymphoma.