目的: 探讨卵巢卵泡膜细胞瘤和细胞性纤维瘤的磁共振成像( magnetic resonance imaging，MRI) 诊断
价值。方法: 回顾性分析16 例女性病人经手术病理证实的17 个卵巢卵泡膜细胞瘤或细胞性纤维瘤的MRI 表现
和相关临床、病理表现。结果: 大多数病人( 76．5%) 是绝经后妇女。58．8%的病人表现为血清CA－ 125 升高。
MRI 可揭示如下特点: ( 1) 肿瘤大部较大，约123．7±46mm，47．0%为囊实性，43．7%为类圆形。( 2) T2WI 大部分肿
块表现为混杂信号占56．3%; T1WI 大部分表现为低信号占43．8%; DWI 表现为不均匀高信号占31．3%; 增强扫描
大部分表现为无强化和明显不均匀强化，分别占43．8%和25．0%。肿瘤之外，未发现子宫增大或内膜异常增厚。
结论: MRI 在卵泡膜细胞瘤或细胞性纤维瘤的诊断和鉴别诊断中有较大价值。

Objective: To study MRI diagnosis of ovarian thecoma and cellular fibroma．Methods:
MRI appearances of 17 ovarian thecoma or cellular fibroma 16 female patients confirmed by surgical
pathology were retrospectively reviewed and correlated with clinical and histological findings．Results:
Most patients were post －menopausal females 76．5% of cases． 58．8% of patients showed an elevated
serum carbohydrate antigen 125( CA－125) level．On MRI，distinct features were revealed as following:
( 1) The tumors were larger，about 123．7±46mm，47．0%were cystic，43．7%were oval． ( 2) Majority of
the mass( about 56．3%) showed mixed intensity on T2WI; Most of the mass ( accounted for 43．8%)
showed low intensity on T1WI; DWI showed heterogeneous high intensity( accounted for 31．3%) ; Majority
of the mass showed non－enhanced and significantly heterogeneous enhancement on enhancement
scan，Accounting for 43．8%and 25．0%respectively．Outside of the tumor，no uterine enlargement or intimal
thickening was found．Conclusion: MRI has the superiority to show the distinct appearances of thecoma
or cellular fibroma．

R445．2