Objective To discuss the CT manifestation of retroperitoneal malignant mesenchymoma .

探讨腹膜后恶性间叶瘤CT和增强表现及鉴别诊断要。

The malignant mesenchymoma is not rare actully,but owing to the one sidedness of sampling,it is always diagnosed pathomorphogically as one singletissue sarcoma.

恶性间叶瘤并不少见，但由取材局限，每把此肿瘤诊断成一种组织肉瘤。