原发性腹膜后脂肪肉瘤的CT诊断

摘要

目的:探讨原发性腹膜后脂肪肉瘤的病理特点与CT表现的相关性.方法:回顾性分析经手术病理证实的18例腹膜后脂肪肉瘤的CT资料,并与病理组织学进行对照分析.结果:肿瘤的大小:11.4cm×4.4cm×10cm至27.9cm×22.7cm×34cm,肿瘤形态不规整.18例脂肪肉瘤中,高分化型脂肪肉瘤4例,以脂肪密度肿块为主,内有条网状分隔及小结节影；黏液性脂肪肉瘤3例,其中1例以囊性密度肿块为主,强化不明显,2例以棉絮样低密度肿块为主；多形性脂肪肉瘤3例,表现为软组织密度肿块影,病灶内可有坏死液化；去分化脂肪肉瘤2例,为脂肪密度与软组织密度混杂肿块；混合型脂肪肉瘤6例,表现为脂肪、囊性、实性、钙化等多成分混合肿块.结论:腹膜后脂肪肉瘤病理分型,是造成CT表现多样性的主要因素,认识其CT表现的特点有利于提高诊断的准确性.%Objective:To explore the correlation of primary retroperitoneal liposarcoma pathology and CT characteristics.Methods:Retrospective analysis of 18 cases were confirmed by operation and pathology of retroperitoneal liposarcoma CT data and histopathological typing.Results:The size of 18 liposarcomas was ranged from 11.4cm × 4.4cm x 10.0cm to 27.9cm x 22.7cm × 34cm.The shape of liposarcoma was irregular.Well differentiated liposarcoma in 4 cases with fat density mass,within the network partition and nodules.Myxoid liposarcoma in 3 case,including 1 case with cystic density mass was given priority to,aggrandizement was not obvious,2 cases with low density mass mainly cotton sample ;3 cases of pleomorphic liposarcoma,behaved as a soft tissue density mass,within the lesion had liquefaction necrosis.Dedifferentiated liposarcoma in 2 cases,fat density mass with soft tissue density of hybrid;Mixed type in 6 patients with liposarcoma,manifested as fat,cystic,solid,calcification and other ingredients mixed masses.Conclusion:Retroperitoneal liposarcoma complicated composition,is caused by CT manifestations of primary factor,understanding of the CT features is helpful to improve diagnostic accuracy.