IL2 and neoplasm: The ICK results show high immune organ and tumor uptake, but in contrast to 64Cu‐DOTA‐IL‐2‐Fc, the %ID/g of 64Cu‐DOTA‐ICK is higher in the blood (ICK: 13.1; IL‐2‐Fc: 6.5), liver (ICK: 19.4; IL‐2‐Fc: 9.7), spleen (ICK: 33.3; IL‐2‐Fc: 21.1), and tumor (ICK: 14.7; IL‐2‐Fc: 9.3) at 24 h postinjection.