Objective To investigate the CT and MRI features of ovarian fibroma.Methods CT and MRI findings of 42 patients with ovarian fibroma confirmed by operation and pathology were analyzed retrospectively.Twenty-one patients were examined by CT,26 cases was examined by MRI,and 5 cases were examined by CT and MRI.Results In 42 cases of ovarian fibroma,there were simple type in 29 cases,degenerative type in 11 cases,and special type in 2 cases.All the cases had single lesion,morphology were round or elliptic or lobulated,clear boundary in 40 cases,partial fuzzy boundary in 2 cases,3 cases with calcification,hemorrhage in 1 case.The maximum tumor diameter were 1.4-26.7 cm,median value was 5.5 cm.Simple type of ovarian fibroma were equal density on CT,low signal on T1WI and T2WI.Degeneration type was patchy,fissure,low density areas on CT or high signal on T2WI,and the tumor parenchyma was almost no enhancement or only slight enhancement.A large number of hemorrhages had been found in 1 special type patient,and significantly enhanced in the other special type patient.Special type were misdiagnosed as malignant tumor.Conclusion CT and MRI performance of ovarian fibroma has some characteristics,but diagnosis still need to rely on pathology.%目的 探讨卵巢纤维瘤的CT及MRI特征.方法 回顾性分析经手术病理证实的42例卵巢纤维瘤的CT及MRI资料,21例患者接受CT检查,26例接受MR检查,5例同时接受CT和MR检查,分析其CT和MR特征.结果 42例卵巢纤维瘤中单纯型29例,变性型11例,特殊型2例.肿瘤均单发,呈圆形、类圆形或分叶状,边界清晰40例,部分边界模糊2例,伴钙化3例,出血1例.肿瘤最大径1.4～26.7 cm,中位值5.5 cm.单纯型CT平扫呈等密度,MRI上T1WI及T2WI均呈低信号;变性型CT呈斑片状、裂隙状低密度区,T2WI呈高信号,增强扫描肿瘤实质几乎无强化或仅轻微强化;特殊型1例内见大量出血,1例明显强化,均误诊为恶性肿瘤.结论 卵巢纤维瘤的CT及MRI表现具有一定的特征,但确诊仍需依靠病理.
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