摘要
目的：探讨卵巢颗粒细胞瘤的MRI特征。方法：回顾性分析10例经手术病理证实的卵巢颗粒细胞瘤的MRI表现。结果：10例中双侧病变1例,单侧病变9例。肿瘤直径3.0-18.0 cm,平均6.5 cm,呈卵圆形、圆形,包膜完整,表面光整,界限清楚。10例中实性3例,囊实性7例,瘤内多发大小不等囊变,囊隔厚薄不均,其中囊变大于3 cm者7例。10例T1WI及T1WI FS均呈等低信号;T2WI及T2WI FS呈等高信号6例,T2WI及T2WI FS呈高低混杂信号4例;DWI b值800呈等高信号6例,高低混杂信号4例,ADC图呈高低混杂信号7例,等低信号3例。所测得的ADC值提示卵巢颗粒细胞瘤趋向恶性。10例中子宫体增大及内膜增厚7例,雌激素水平升高8例。结论：卵巢颗粒细胞瘤易囊变、出血,MRI信号较混杂;多合并子宫体增大及内膜增生,有助于MRI诊断及鉴别诊断。
Objective：To determine MRI features of ovarian granulosa cell tumor.Methods：A retrospective analysis of MR images was performed in 10 patients with pathologically proven ovarian granulosa cell tumor.Results：Of the 10 patients,1 had bilateral lesions and 9 had unilateral lesions.Mean tumor diameter was 6.5cm with a range of 3.0~18.0cm.MRI revealed well-circumscribed,round to oval,encapsulated masses composed of solid（n=3） or mixed solid-cystic（n=7） components consisting of multiple cysts of varying size（3cm in 7 cases） and septations of varying thickness.Ovarian granulosa cell tumor exhibited hypo-/iso-（n=10） intensity on T1WI and T1WI fat-suppressed（FS）,iso-/hyper-（n=6） and mixed hypo-/hyper-intensity（n=4） on T2WI and T2WI FS,iso-/hyper-intensity（n=6） and mixed hypo-/hyper-intensity（n=4） on DWI（b value of 800s/mm2）,mixed hypo-/hyper-intensity（n=7） and iso-/hypo-intensity（n=3） on ADC maps.The calculated ADC values indicated malignancy for all the lesions.Uniformly enlarged uterus and thickened endometrium were seen in 7 cases.Serum estrogen levels were elevated in 8 cases.Conclusions：Ovarian granulosa cell tumor often has some specific MRI appearances.MR imaging can suggest the diagnosis,particularly when an encapsulated ovarian mass composed of mixed solid and cystic pattern and hemorrhagic component seen as mixed signal on T1WI,T2WI,DWI and ADC is found with uniformly enlarged uterus and thickened endometrium.
出处
《放射学实践》
北大核心
2011年第8期866-868,共3页
Radiologic Practice
关键词
卵巢肿瘤
颗粒细胞瘤
磁共振成像
Ovarian neoplasms
Granular cell tumor
Magnetic resonance imaging
