卵巢甲状腺肿MRI和CT表现

目的 分析卵巢甲状腺肿的MRI、CT表现。方法 回顾性分析14例经手术病理证实的单发卵巢甲状腺肿患者的MRI及CT表现，观察其形态、大小、密度/信号、强化特点等。结果 14例病变均表现为包膜完整的囊实性肿块，其中分叶状11例，类圆形3例；多囊状13例，单囊1例；11例实性成分为明显厚壁或分隔，3例呈结节状。肿瘤最大径为3~34 cm，平均（11.34±2.24） cm。7例MR T2WI囊性部分均可见极低信号区，增强后无强化，实性成分明显强化。7例CT囊性部分均可见高密度区，CT值57~90 HU，增强扫描未见强化；实性成分明显强化，CT值为145~270 HU；4例囊壁或实性结节中见斑片状钙化。结论 卵巢甲状腺肿的MRI、CT表现具有一定特征性，有助于诊断及鉴别诊断。

MRI and CT features of struma ovarii

Objective To analyze MRI and CT features of struma ovarii (SO). Methods CT and MRI findings of 14 patients with pathologically confirmed single SO were retrospectively analyzed. The morphology, size, density/signal intensity and enhancement pattern of lesions were analyzed. Results All the tumors appeared as well-defined cystic-solid masses, 11 were multilobulated and 3 were round-like. Thirteen lesions were multicystic, and 1 was unilocular. The solid components appeared as thickness septa or wall in 11 and as nodule in 3 lesions. The maximum diameter of the tumors were 3-34 cm, with an average size of (11.34±2.24)cm. MRI showed extremely low signal intensity regions in cyst portion of 7 masses on T2WI without enhancement, while obvious enhancement in solid potion. CT showed high attenuation in cyst portion of 7 masses without enhancement, CT value were 57-90 HU, whereas the solid potion obviously enhanced, and CT values were 145-270 HU. Plaque-like calcification on the walls or nodules were observed in 4 patients. Conclusion CT and MRI findings of SO have certain characteristics, which are helpful for diagnosis and differential diagnosis.