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【目的】探讨腹膜后脂肪肉瘤的MRI表现,并与病理学结果做对照研究。【方法】回顾性分析19例经病理证实的腹膜后脂肪肉瘤。所有病例均行MRI平扫和增强扫描。【结果】黏液型脂肪肉瘤MRI上以T1WI低信号、T2WI高信号为主;组织学上以黏液成分为主,脂肪含量少,增强后可见明显强化的实性成分和粗大的间隔影。高分化脂肪肉瘤,成熟脂肪成分占75%,并可见纤细的间隔影。圆细胞型和多形性脂肪肉瘤的MRI表现没有特征性;其中圆细胞型脂肪肉瘤可见瘤内出血。去分化型脂肪肉瘤中可见少许脂肪成分,且脂肪成分和非脂肪性实性组织间分界非常清楚。【结论】不同组织亚型的腹膜后脂肪肉瘤的MRI表现不同,取决于其组织学成分;MRI可以清楚地显示其形态、内部成分和周边结构,是诊断腹膜后脂肪肉瘤的理想方法。

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肾移植是终末期肾病的重要治疗手段。随着肾移植手术需求量的增大及对术后移植肾功能恢复 要求的增高，术前供肾的筛选及评估引起了临床医师的关注。术前全面清晰了解肾动、静脉的正常解剖及变异，可缩短手术时间，提高手术成功率。随着影像学技术的不断发展，多层螺旋CT 血管造影（MSCTA）、磁共振 血管造影（MRA）、彩色多普勒超声及肾动脉血管造影已成为术前评估供肾血管情况的主要影像学方法，其中 MSCTA 具有快速、相对无创、敏感性及准确性高等特点，可作为活体肾移植前了解供肾血管的首选检查方法。本文综述了各种影像学方法的优、缺点，临床医师需根据患者的不同需求来选择最合适的影像学评估方法。 [ABSTRACT FROM AUTHOR]