CT feature of thyroid adenoma was single ovoid homogenous hypodensity lesion, but multinodular goiter appeared multiple irregular lesions with inhomogenous density.

• 单发类圆形均匀低密度结节是甲状腺腺瘤的特征性表现，结节性甲状腺肿以多发不规则形混杂密度病灶为特征。