In tumour, spleen, duodenum, brown fat, lymph nodes and thymus, 111In-anti-PD-1 and 111In-anti-PD-L1 uptake, detected by SPECT/CT 3 days after injection, was associated with expression of the respective organ proteins by immunohistochemistry, supporting the role of these radiolabelled antibodies in pretreatment imaging and therapy monitoring (Fig. 1). This evidence concerns the gene CD274 and neoplasm.