in hamsters bearing a human colonic carcinoma xenograft producing carcinoembryonic antigen ( cea ) , we injected donkey anti-goat igg 24 hr after administration of 131i-labeled goat anti-cea igg and achieved enhanced tumor imaging 24-48 hr later , with a significant relative decrease of radioactivity in blood and all major organs except the spleen .
C0086418
human
C0007082
cea