目的探讨脂肪肉瘤的CT、MRI 表现特点。方法 回顾性分析25例经手术 病理证实为脂肪肉瘤的患者资料，分析 其CT、MRI的影像学表现与病理结果的关 系。所有病例均行CT或MRI平扫和增强扫 描；由于这些病例都是回顾性分析，所以 并不是每个病例都均有CT和MRI图像的完 整资料。结果 粘液型脂肪肉瘤13例，均 表现为介于水与软组织之间的液体密度或 信号，含有少量脂肪密度或信号，增强扫 描轻度强化或絮状、网状明显强化；高分 化脂肪肉瘤9例，均表现为以脂肪密度或 信号为主的肿块，增强后仅见间隔或实性 部分轻微强化；去分化脂肪肉瘤2例，表 现为以实性肿块为主、含有或多或少量的 脂肪密度或信号，增强扫描实性部分明显 强化；小园细胞脂肪肉瘤1例，表现为仅 有实性肿块，无脂肪成分，增强扫描明显 不均匀强化；本组无多形性脂肪肉瘤。结 论 不同组织亚型的脂肪肉瘤的CT、MRI表 现不同，取决于其组织学成分。

Objective To assess the CT and MRI imaging features of liposarcoma. Methods 25 cases of liposarcoma proved pathologically were retrospectively studied.All patients underwent CT or MRI examination before and after intravenous administration of contrast agent.Because this study was a retrospective review,complete imaging data were not available for each patient. Results 13 of Myxoid liposarcomas consists of myxoid matrix as the predominant component and small amounts of mature fat,showed light enhancement or enhancement with inhomogeneous and flocculent strengthen.9 of Welldifferentiated liposarcomas showed masses with fat-density and fewer enhancement.2 of Dedifferentiated liposarcoma was demonstrated as fat-density containing soft tissue,showed moderate to the marked homogenous enhancement in the non-fatty areas.1 of Roundcelled liposarcoma displayed as soft tissue mass containing no fat,showed inhomogeneous and strong enhancement.There is not pleomorphic liposarcoma in this study. Conclusion Different subtypes of liposarcomas exhibited varying CT and MRI features,depending on their histological components.