卵巢囊性畸胎瘤的MRI诊断价值

The value of MRI in diagnosis of ovarian cystic teratoma

目的探讨卵巢囊性畸胎瘤的MRI表现及诊断价值。方法回顾性分析52例经临床手术病理证实的卵巢囊性畸胎瘤的MRI表现。结果52例均经病理证实为囊性畸胎瘤,其中单侧43例,双侧9例,瘤体61个,瘤体直径最大12.8cm,最小2.7cm。MRI表现以囊性为主,囊区T_1WI呈低信号、T_2WI呈高信号,囊壁光整;部分区域含有T_1WI和T_2WI均呈高信号而脂肪抑制序列呈低信号的脂肪信号影,呈囊性或实性混杂信号病灶;增强扫描囊壁可强化。MRI诊断符合率为100%。结论卵巢囊性畸胎瘤有MRI特征性表现,MRI检查可作出明确诊断。

Objective To study the MRI manifestations and diagnostic values in ovarian cystic teratoma. Methods MRI appearances of 52 cases of ovarian cystic teratoma confirmed by surgery and pathology were analyzed retrospectively. Results All of 52 cases were confirmed as mature cystic teratoma by pathology. Of the 52 cases, 43 were unilateral, 9 cases bilateral. And 61 lesions were totally found. The diameter of lesions was 12.Scm-2.7cm, The appearance of MRI was mainly cystic. The cystic area of the lesion showed low signal intensity on T1WI and high signal intensity on T2WI, The wall of the cyst was smooth and enhanced after contrast medium administration. MRI revealed that 52 cases were mixed intensity and containing variety of fat signal intensity area. The accuracy of MRI diagnosis in ovarian cystic teratoma was 100%. Conclusion Ovarian teratoma has characteristic appearances in MRI. Pelvic MRI examination for ovarian teratoma can make exact diagnosis.