Other radioisotopes used in clinics to treat cancers include Ga-68-DOTATATE, Lutetium-177-DOTATATE (to treat leukemia and pancreatic cancer), Ga-68-PSMA (to treat PCa) [46,47], and Lutetium-177-PSMA (also used to treat PCa) [48,49]. The gene discussed is FOLH1; the disease is leukemia.