AFP and neoplasm: Tumor burden was not statistically different between groups prior to RIT, with mean serum AFP concentrations of 185,986 ± 127,154 ng/mL in the no treatment control group, 166,370 ± 119,541 ng/mL in the αGPC3-DOTA control group, and 180,613 ± 155,557 ng/mL in the 90Y-DOTA-αGPC3 group (p = 0.97).