CEACAM5 and neoplasm: Tumor uptake of 89Zr-AMG211 in CEA-positive BT-474 xenograft models was 3.8 ± 1.1% ID/g with T/B ratio of about 10 at 24 h p. i., while uptake was significantly lower in the CEA-negative HL-60 xenograft models (p < 0.01).