NECTIN4 and neoplasm: Uptake in physiologically Nectin-4–expressing tissues such as skin and salivary glands showed weaker and less consistent associations: Skin SUVmean displayed a weak inverse correlation with tumor volume (r = −0.36), while skin TE and SG SUVmean were only weakly positive (r = 0.27 and r = 0.38, respectively), and SG TE showed no meaningful relationship (r = −0.11).