腹膜后平滑肌肉瘤的CT与MRI诊断(附8例报告)

CT and MRI diagnosis of retroperitoneal leiomyosarcoma( 8 cases report)

目的探讨腹膜后平滑肌肉瘤的CT与MRI表现,提高该病的诊断水平。方法回顾性分析医院8例经手术病理证实的腹膜后平滑肌肉瘤,分析其CT与MRI表现。结果 8例中7例发生于女性,均为单发,体积较大、其中6例直径>5cm;7例肿块密度、信号不均匀,内见范围不等的坏死区,增强扫描显示更清晰;动态增强扫描4例,CT与MRI表现相仿、呈渐进性、持续性中等程度强化;肿瘤累及输尿管至肾积水2例,累及邻近髂静脉1例。结论腹膜后平滑肌肉瘤是一种少见肿瘤,CT与MRI具有一定特征性表现,认识其影像学表现,有助于术前诊断。

Objective To investigate CT and MRI findings of retroperitoneal leiomyosarcoma , improve the diagnostic level of the disease .Methods a retrospective analysis of our hospital in 8 cases with pathologically proved retroperitoneal leiomyosarcoma, analysis the CT and MRI findings.Results 7 cases occurred in women, are single, larger, and 6 cases of diameter greater than 5cm;7 cases of tumor’s density and signal is not uniform, within the range of necrosis area, enhanced scan showed more clear;CT and MRI fingdings are similar in 4 cases of dynamic enhanced scan , which are progressive , sus-tained and moderate enhancement;2 cases of tumor involvement of the ureter to hydronephrosis , 1 cases involving the adjacent iliac vein.Conclusion retroperitoneal leiomyosarcoma is rare , CT and MRI has certain characteristic features , the under-standing of the imaging manifestations are helpful in diagnosis .