腹膜后脂肪肉瘤的CT、MRI诊断

目的：研究腹膜后脂肪肉瘤的ＣＴ、ＭＲＩ诊断。方法：本组经病理证实１９ 例，男８例，女１１ 例，平均年龄５４．０ 岁。ＣＴ检查１３例，其中ＣＴ强化扫描６ 例；ＭＲＩ检查９例。结果：１９ 例中发生于肾周围８例，其他部位１１例。１８例单发，１例多发。肿瘤直径＞ １０ｃｍ １８例，＜ １０ｃｍ １例。肿瘤内含有脂肪组织密度或信号强度者１８例，其中１ 例呈均匀脂肪改变，１７ 例脂肪肉瘤内见条、片、块肌肉组织改变；１例呈完全肌肉样改变。肿瘤侵犯周围组织器官９例，压迫改变１０例。结论：腹膜后巨大肿块，含有脂肪密度或信号强度者应诊断本病。

CT and MRI Diagnosis of Retroperitoneal Liposarcoma

Objective:To study the CT and MRI diagnosis of retroperitoneal liposarcoma.Methods:19 cases of retroperitoneal liposarcoma were presented.There were 8 men and 11 women with an average age of 54.0 years old.CT studies were obtatined in 13 cases ,in which contrast-enhand were done in 6 cases and MRI were perfomed in 19 cases.Results:8 cases were presented in perirenal capsular,and 11 cases out of perirenal capsular.18 cases were single lesion,and one case was multiple lesion.The tumor more than 10cm in diameter were in 18 cases,and less than 10cm in diameter in one case.Strip,flake or mass fatty components demonstrating on CT or MRI were showed in 18 cases,a muscular tissue mass in one case.Invasion of adjacet organ or tissue were seen in 9 cases,and displacement change in 10 cases.Conclusion:the diagnosis of retropentoneal liposarcoma should be considered if a retroperitoneal mass with a obvious fatty components showed on CT or MRI.