卵巢甲状腺肿的CT和MRI表现与病理对照分析

目的：探讨卵巢甲状腺肿(SO)的 CT、MR 影像学表现特点。方法回顾性分析经手术病理证实的10例 SO 患者的影像学及组织学资料,其中6例行 CT 平扫及增强扫描,4例行 MR 平扫及增强扫描。结果10例 SO 均为单发,呈分叶状或椭圆形,边缘清楚,直径<10 cm,4例伴有腹腔积液。6例囊实性,4例囊性,囊性部分密度及信号多变,CT 表现为低密度或高密度,4例出现高密度囊腔。MRI 表现为以 T1 WI 低信号、T2 WI 高信号或 T2 WI 低信号为主,1例表现为 T1 WI 低信号、T2 WI 极低信号的“真空征”,增强后实性部分及囊壁明显强化。结论SO 的 CT、MR 表现反映了其病理学特征,对其诊断及鉴别诊断有重要价值。

CT,MRI features and pathological manifestations of struma ovarii

Objective To evaluate the charateristics of CT and MR imaging of struma ovarii(SO).Methods 10 lesions of 10 pa-tients confirmed by pathology were analyzed retrospectively.6 cases were performed plain and enhanced CT scan and 4 were under-went MR before operation.Imaging features were analyzed retrospectively correlated with histological findings.Results All the SO tumors were appeared as solitary,well-defined,lobulated or oval masses.The largest diameter was less than 10 cm.Ascites were found in 4 cases.Six of SOs were solid-cystic and four were cystic.The cystic portion was low density or high density on CT images. High density cysts were shoewed in 4 cases.On MR images,the cystic portion was hypointenstiy on T1 WI and hypo/hyperintensity on T2 WI.Vacuum phenomenon (hypointenstiy on T1 WI and extremly hypointensity on T2 WI)was observed in 1 case.Solid compo-nent and cystic wall showed remarkable enhancement.Conclusion CT and MR images of SO can reflect its histopathologic charater-istics,which provides important value in the diagnosis and differential diagnosis of SO.