Compared to the reference compound 111In-IMP-288, 111In-RDC018 showed similar tumor-specific uptake in CEA-positive TF2-pretargeted tumors (Fig. 1, 8 nmol; TF2, Additional file 2: Figure S2, 0 nmol and 0.8 nmol TF2). The gene discussed is CEACAM5; the disease is neoplasm.