In contrast, the derivative [111In]In-DOTA-Tz-TCO-Pip-AR bearing the piperidinyl linker (see Figure S4 and Table S3 in the Supplementary Materials) showed lower uptake values in the tumor and pancreas, 3.2 ± 0.1 and 2.8 ± 0.5%I.D./g, respectively, at one-hour post-injection. This evidence concerns the gene AR and neoplasm.