hyperthyroidism       
noun [ U ]  medical specialized uk/ˌhaɪ.pəˈθaɪ.rɔɪd.ɪzəm/ us/ˌhaɪ.pɚˈθaɪ.rɔɪˌdɪz.əm/
 甲状腺亢进
a condition in which the thyroid gland produces large amounts of hormones
  Graves' disease is a common cause of hyperthyroidism in children and adolescents. 在儿童和少年中,格雷夫斯氏病是导致甲状腺亢进的主要原因。