The observed uptakes in PD-L1 expressing (PD-L1+) tumor xenograft over controls were modest, with increases of 2.2-fold,2.9-fold, 3.0-fold, ∼1.4-fold, and 1.9-fold, resulting in uptakevalues of 1.2% ID/g, 4.0% ID/g, 3.5% ID/mL, ≤ 5% ID/g, and4.2% ID/g for radiotracers [18F]LN,23 [18F]LG-1,24 [18F]LP-F,25 [64Cu]Cu-43b,26 and [68Ga]BMSH,27 respectively. This evidence concerns the gene CD274 and neoplasm.