TNFSF11 and neoplasm: Ex vivo tumor uptake of [64Cu]Cu-NOTA-denos-Fab was significantly higher in RANKL-ME-180 xenografts (2.21 ± 0.50% ID/g) compared with blocked xenografts (0.77 ± 0.040% ID/g, p = 0.0016) and when compared with the negative ME-180 xenograft model (0.65 ± 0.13% ID/g, p = 0.006) (Figure 6B).