FAP and neoplasm: Tumour uptake was significantly lower upon co-injection of a 7.4x excess of unlabelled and unconjugated minibody (4.4 ± 1.45 %IA/g, p = 0.0059), indicating at least a partly FAP-specific uptake (Figure 2B and visualization of IRDye700DX-derived fluorescence in Figure 2D).