卵巢颗粒细胞瘤的MRI诊断

MRI Diagnosis of Ovarian Granulosa Cell Tumor

目的 分析卵巢颗粒细胞瘤的MRI特征。资料与方法 回顾性分析 15例卵巢颗粒细胞瘤的MRI特征 ,并与手术及病理对照研究。结果 15例中 ,囊实性肿块 8例 ,内有多发大小不等的囊性变 ,囊内壁光滑 ,囊内容物MRT1WI呈等低混杂信号 ,T2 WI呈混杂高信号 ,囊与囊间有厚壁分隔 ;实性肿块 3例 ,T1WI及T2 WI信号均高于肌肉 ;单一较大的囊性病灶 4例。 13例子宫均匀增大 ,内膜增厚 ,1例并有子宫内膜癌。结论 诊断卵巢颗粒细胞瘤的可靠依据为 :(1)肿瘤内多发囊变 ,间有厚壁分隔 ,囊内壁光滑 ;(2 )合并子宫体积增大 ,内膜增生。

Objective To discuss MRI features of granulosa cell tumor of ovary.Materials and Methods MRI findings in 15 cases with pathologically proved ovarian granulosa cell tumor were retrospectively analyzed, and a comparison with surgical and pathological results was made.Results Of 15 cases, the lesion presented as mixed cystic solid mass in 8 with multiple cystic degeneration inside, the inner cystic wall was smooth and the cystic contents displayed iso mixed with low intensity signal on T 1WI and mixed high intensity signal on T 2WI, the cysts were separated by thick septa. Solid mass was seen in 3 cases, with the lesion's signal being higher than that of the muscles on both T 1WI and T 2WI. In the remaining 4 cases the lesions were manifested as a solitary large cystic mass. Uniformly enlarged uterus and thickened endometrium were seen in 13 cases.Conclusion Granulosa cell tumor of ovary has two reliable MRI signs: (1) multiple degeneration cysts within the tumor which had a smooth inner wall and were separated by thick septa; (2) enlarged uterus and thickened endometrium are usually accompanied.