Within 12 h post-injection, due to the effective tumor accumulation and relatively less excretion, anti-Gal1-Fe3O4 was mainly distributed in the pancreatic tumor, and was rarely present in other organs such as heart, liver, spleen, lung, kidney and pancreas (Figure 6C), which was consistent with the results of ICP-MS. The gene discussed is LGALS1; the disease is pancreatic neoplasm.