TNFRSF17 and neoplasm: Imaging results showed significantly higher tumor uptake of [18F]FPy-BCMA-Nb in MC38-BCMA xenografts (6 ± 0.8% ID/g) compared to MC38-WT xenografts (1 ± 0.1% ID/g) (P < 0.001, Figure 2E), highlighting the high in vivo specificity of the tracer for BCMA-expressing tumors.