FOLH1 and neoplasm: [111In]In-22 showed tumor uptake of 2.05 ± 0.52% ID/g at 1 h p.i., which steadily decreased to 0.61 ± 0.40% ID/g at 24 h p.i. Compared to [111In]In-PSMA-617, the uptake was lower at 1 h p.i. (3.12 ± 0.30% ID/g, p = 0.05), but comparable at 4 h and 24 h p.i. (p = 0.05).