Methods:Thirty two cases of single benign cold thyroid nodules un derwent PEI. The total amount of anhydrous ethanol injected was approximate ly 1.2 times the volume of thyroid nodule before treatment, which was divided in four doses once a week.

• 方法 :PEI治疗 3 2例孤立性良性甲状腺冷结节 ；平均注射乙醇量为甲状腺结节治疗前容积的 1.；2倍；分 4次进行。