In addition to being used for medical diagnosis, radioisotopes are also used for therapeutic purposes. Patients have been effectively treated with radioactive iodine for over 50 years, experiencing a 30 to 40-year disease-free period after treatment for hyperthyroidism and thyroid cancer. Today, neuroblastoma, pheochromocytomas, prostate cancer, medullary thyroid carcinoma, and neuroendocrine tumours appear to be amenable to similar treatments. In addition, our department provides radiation synovectomy, bone pain relief, and treatment for primary liver cancers, liver metastases, and liver cancers.