既往对I~(131)治疗甲亢后产生暂时性甲减的问题未引起注意,本文报道2例I~(131)治疗后并发暂时性甲减。例1 56岁,女,1973年甲亢复发前已用过二个疗程抗甲状腺药物。1974年2月用I~(131)治疗,5月进行第二次I~(131)治疗,10月因临床症象及生化检查无好转又进行了第三次I~(131)治疗。1975年1月复诊时症状显著好转,体重增加。甲状腺正常,但甲状腺功能测验:血浆TSH 34毫单位/升(正常<6)、T_(3∶)2.7毫 Previous I ~ (131) treatment of hyperthyroidism after a temporary hypothyroidism caused no attention, this article reports two cases of I ~ (131) after treatment of concurrent hypothyroidism. Example 1 56-year-old female, 1973 hyperthyroidism has been used before the relapse of two courses of anti-thyroid drugs. In February 1974 with I ~ (131) treatment, in May for the second I ~ (131) treatment, in October due to clinical symptoms and biochemical tests did not turn again for the third I ~ (131) treatment. January 1975 when symptoms significantly improved, weight gain. Thyroid normal, but thyroid function test: plasma TSH 34 milliunits / liter (normal <6), T_ (3: 2.7) milliseconds