Muscular hypertrophy is one of the signs of hypothyroidism.肌肉肥大是甲状腺机能减退的症状之一。The patient displays signs of hypothyroidism due to drug toxicity.因为药物的毒性，患者出现了甲状腺功能衰退症状。Thyroid ectopia is a frequent cause of congenital hypothyroidism甲状腺异位是引起先天性甲状腺功能低下的一个十分常见的原因。