Authors reported how splenic uptake of the radiotracer affected the tumor uptake and how the co-injection of labeled antibodies and 100-fold of unlabeled antibodies significantly reduced splenic uptake of the radiotracer at 24 h, shifting the concentration of [111In]DTPA-anti-PD-L1 in the blood and potentially increasing tumor uptake [65]. Here, CD274 is linked to neoplasm.