Objective To discuss the CT manifestation of retroperitoneal malignant mesenchymoma .

探后恶性间叶的CT平扫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.

恶性间叶并不少见，但由于病例取材局限，每把诊断成一种组织的肉。