In mice bearing LNCaP tumors, [18F]AlF-PSMA-137 showed high accumulation in the kidneys (75.19 ± 20.04% ID/g) and tumor (24.29 ± 3.06% ID/g) at 1 h p.i., which could be specifically blocked by ZJ-43 (block value: kidneys: 2.39 ± 1.92% ID/g, p = 0.0017, tumor: 2.09 ± 0.81% ID/g, p = 0.0006) (Figure 3B and Table S1). This evidence concerns the gene FOLH1 and neoplasm.