CEACAM8 and leukemia: 90Y-labelled BW 250/183 (a murine IgG1 mAb directed against carcinoembryonic antigen-related cell adhesion molecule 8 or CEACAM8 or CD66b, that is expressed on the cell surface of almost all human granulocytes and their more mature precursors) is being investigated as a form of radioimmunotherapy in children with r/r leukemia before allo-HCT, as prior dosimetry studies with indium-111 labelled anti-CD66 have shown favorable dose distributions (NCT04082286) [143].