AR and neoplasm: [111In]In-DOTA-Tz-TCO-PEG4-AR demonstrated good and fast uptake values in the tumor and in the tissues expressing the GRPR receptor such as the pancreas (8.4 ± 0.5 and 25.2 ± 3%I.D./g, respectively, at 15 min post-injection), as shown in Figure 6.