While 18F-labeled galactodendritic unit 4 binds to and accumulates in galectin-1–overexpressing UMUC3 bladder tumors (Fig. 4), the glucose radiotracer 18F-FDG is reabsorbed after intravesical administration and accumulates in the kidneys and heart (Supplemental Fig. 15). The gene discussed is LGALS1; the disease is urinary bladder neoplasm.