The secondary hypothyroidism after radioiodine therapy and the replacement treatment

The secondary hypothyroidism is the most important intercurrent disease after radioiodine therapy. The early hypothyroidism and the late hypothyroidism are incompletely different in pathogenesis. It needs researching further. There has not yet been an affirmable answer to choose the distillates from animal hypothyroid extract or complex preparation of levo-thyroxine in replacement treatment.