卵巢卵泡膜瘤-纤维瘤的磁共振T2WI信号特点及强化表现分析

MR Diagnosis of Ovarian Thecoma-fibromas

目的:探讨卵巢卵泡膜瘤-纤维瘤的T2WI信号特点及其诊断价值。方法:回顾性分析经手术病理证实的26例29个卵巢卵泡膜瘤-纤维瘤的MRI表现。结果:26例29个卵泡膜瘤-纤维瘤中,卵泡膜纤维瘤19个,纤维卵泡膜细胞瘤6个,卵泡膜细胞瘤4个。与肌肉信号对比,所有肿瘤T1WI呈等信号,卵泡膜纤维瘤T2WI呈低信号9个,等信号3个,等低信号2个,稍高信号4个,高低混杂信号1个,3例小囊变,1例大囊变。纤维卵泡膜细胞瘤T2WI呈低信号3个,等信号1个,等低信号2个,2例大囊变,1例小囊变,1例伴有腹水。卵泡膜细胞瘤T2WI呈稍高信号1个,高信号3个,2例伴有腹水。所有肿瘤增强后24例轻度强化,2例中度强化。结论:T2WI信号特点结合少血供的强化特点对卵泡膜瘤-纤维瘤的诊断具有重要的定性诊断价值,有助于提高术前诊断正确率。

Purpose： To study the T2WI signal characteristics of ovarian thecoma-fibroma and its diagnostic value. Methods： A retrospective analysis of MRI manifestation of ovarian thecaoma-fibroma in 26 cases confirmed by surgery pathology results was conducted. Results： 0f29 thecaoma-fibroma in 26 cases： 19 were theca fibromas, 6 were fiber theca cell tumors, and 4 were theca cell tumors. Compared to the signal intensity of muscle, all tumors were with iso- intensity signal on T1WI. Nine theca fibromas were with low-intensity signal, 3 with iso-intensity signal, 2 with slight low-intensity signal, 4 with slight high-intensity signal, and 1 with mixed intensity signal on T2WI; 3 cases were with small cysts, and 1 with large cystic change. Three fiber theca cell tumors were with low-intensity signal, 1 with iso- intensity signal, 2 with slight low-intensity signal on T2WI, 1 cases were with small cysts, and 2 with large cystic change, 1 case with ascites. One theca cell tumor was with slight high-intensity signal, 3 were with high-intensity signal on T2WI; 2 cases were with ascites. The tumors in 24 cases were with mild enhancement, and 2 with mild- to-moderate enhancement on post-contrast exam, Conclusion： T2WI signal characteristics combining with the mild enhancement will help the diagnosis oftheca tumor-fibroma