Hypothyroidism (hyperthyroidism,

Short for hypothyroidism, commonly known as hypothyroidism) is a systemic metabolic syndrome caused by decreased synthesis and secretion of thyroid hormones or insufficient tissue utilization. The general population is about 1.0% (more women than men), which increases with age. There are many reasons for hypothyroidism, which can occur after radioactive iodine treatment. After iodine-13 1 treatment, hypothyroidism can be divided into early hypothyroidism and late hypothyroidism. Any treatment method will inevitably produce a certain proportion of hypothyroidism, but it is convenient and sensitive to make early diagnosis and physiological replacement for hypothyroidism now. Therefore, clinicians in some parts of the world (represented by North America) use large doses of 13 1 to treat hyperthyroidism to ensure a high cure rate. Early hypothyroidism: refers to hypothyroidism that occurs within one year after treatment, and it is reported about 10% in China. The cause of early hypothyroidism is the direct destruction of thyroid cells by radiation, which is related to the dose of iodine-13 1 and the sensitivity of individuals to radiation. At present, the occurrence of early hypothyroidism is unpredictable and inevitable. Even if a low dose of iodine-13 1 is used to treat hyperthyroidism, there is no guarantee that hypothyroidism will never occur. If the incidence of early hypothyroidism is reduced by reducing the dose of iodine-13 1, the cure rate will inevitably decrease. The main purpose and advantage of iodine-13 1 treatment is to control hyperthyroidism as soon as possible, not to avoid hypothyroidism. If thyroid hormone replacement therapy is given in time after hypothyroidism occurs, patients can grow and give birth normally and maintain normal quality of life. Some patients with early hypothyroidism can recover thyroid function on their own. Late hypothyroidism: refers to the hypothyroidism that occurs after receiving iodine-13 1 for one year, increasing at the rate of 2%~3% every year. The etiology of late hypothyroidism is not clear, which may be related to autoimmune disorder and has nothing to do with the dose of iodine-13 1. Late hypothyroidism is not unique to iodine-13 1 treatment, but can also occur after medical treatment and surgical treatment, even without any treatment measures. The incidence of spontaneous hypothyroidism can be as high as 16%~20%. Therefore, hypothyroidism may be one of the natural results of the development of G course. The principle of treatment is early detection and timely replacement treatment.

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