[病例]女,11岁。3年前无何诱因逐渐多食、多汗、心慌,上肢不自主颤抖,突眼、甲状腺肿大,经栓查诊断为甲状腺机能亢进(甲亢),口服甲基硫氧嘧啶和他巴唑治疗。1年后,上述症状加重,并伴有心跳气短,二尖瓣听诊区可闻及Ⅲ级收缩期杂音。心电:窦过速、左室肥厚劳损。近半年烦渴、多饮、多尿、消瘦、乏力。近20天因受凉后发热,多饮、多尿加重,近7天因劳累出现厌食、呕吐、烦渴、多尿、精神不振、乏力。门诊以“甲亢、脱水酸 [Case] ​​Female, 11 years old. 3 years ago, no incentive to gradually eat more, sweating, palpitation, upper limb involuntary tremors, exophthalmos, goiter, diagnosed by suppositories for hyperthyroidism (hyperthyroidism), oral methylthiouracil and methimazole treatment . A year later, the above symptoms worsened, accompanied by shortness of breath, mitral auscultation area can be heard and Ⅲ systolic murmur. ECG: sinus tachycardia, left ventricular hypertrophy strain. Nearly six months polydipsia, polydipsia, polyuria, weight loss, fatigue. Nearly 20 days due to cold after the fever, drink more, increased urine, nearly 7 days due to fatigue, anorexia, vomiting, polydipsia, polyuria, lack of energy, fatigue. Outpatient to "hyperthyroidism, dehydration acid