卵巢甲状腺肿的MRI表现

MR findings of struma ovaril

目的探讨卵巢甲状腺肿(SO)的MRI表现特征。方法回顾性分析我院病理证实的8例SO的MRI资料,分析其影像学特征。结果8例SO呈单侧卵巢不规则囊实性肿块影,肿瘤最大径5.7~13.1 cm,平均(9.7±2.8)cm。肿块均可见较厚分隔。MRI表现为T 2WI肿瘤实质及分隔呈混杂高信号,内见低信号结节,囊腔呈T 2WI高信号,4例囊腔内见低信号并可见上层高信号-下层低信号的液液平面。T 1WI肿瘤实质呈低信号,囊腔内见不规则斑片状T 1WI高信号。DWI显示肿瘤实质呈高信号,囊腔呈高低混杂信号。增强扫描肿瘤实质及分隔明显强化,囊腔无强化,呈“花环状”改变。5例可见迂曲扩张的卵巢动脉供血。结论卵巢较大囊实性肿块,信号较混杂,T 2WI内低信号及高低信号的液液平面及T 1WI内高信号较有特异性。增强扫描肿瘤实质及分隔明显强化。此时应考虑SO可能。

Objective To investigate the MRI features of struma ovaril(SO).Methods The MRI data of 8 cases of SO confirmed by pathology in our hospital were retrospectively analyzed and their imaging features were analyzed.Results 8 cases of SO were unilateral attachment irregular sac solid mass shadow.The maximum diameter of the tumor was 5.7 to 13.1 cm,with an average of(9.7±2.8)cm.The lumps were all visible with a thicker separation.MRI showed a high signal of T 2WI tumor parenchyma and septum,low signal nodules in the lumen,T 2WI high signal in the cystic cavity,and low signal in the T 2WI cystic cavity and fluid-liquid plane in the upper layer high signal-lower layer signal.The T 1WI tumor showed a low signal in the parenchyma and a irregular patchy T 1WI high signal in the cystic cavity.DWI tumors showed a high signal in the parenchyma,and the cystic cavity showed high and low mixed signals.The enhanced scanning tumor parenchyma and separation were significantly enhanced,and the cystic cavity was not enhanced,showing a"flower ring"change.In 5 cases,the ovarian artery with tortuous expansion were seen to supply blood.Conclusion SO should be diagnosed when the ovarian appears a larger cystic mass,the signal is more mixed,enhanced scanning of tumor parenchyma and significant enhancement of separation,and the low signal in T 2WI and the high signal in the liquid blood plane and T 1WI are more specific.