腹膜后恶性间叶瘤的CT诊断

The CT Diagnosis of Retroperitoneal Malignant Mesenchymoma

目的:探讨腹膜后恶性间叶瘤的CT平扫和增强表现及鉴别诊断要点。方法:回顾3例经手术病理证实的腹膜后恶性间叶瘤的CT平扫和增强资料,3例均行CT平扫,2例加作增强。结果:3例均表现为腹膜后单发巨大混合密度肿块,均有点状及大块状钙化,3例瘤内均有脂肪密度,增强扫描所有瘤灶内软组织成分有轻度至中度强化。结论:肿瘤呈单发巨大混合密度肿块,内有脂肪密度区及点状及大块状钙化灶为腹膜后恶性间叶瘤的典型CT表现。肿瘤呈软组织密度时不能与其他间叶组织肿瘤区别。

Objective To discuss the CT manifestation of retroperitoneal malignant mesenchymoma . Methods The CT data of 3 cases retroperitoneal malignant mesenchymoma with verlfield by pathology were reviewed retrospectively. To analyze the CT manifestation. 3 cases were examined by CT plain scanning and 2 cases by contrast enhancement scanning preoperatively. Results Isolated large heterogenous soft tissue mass was found in 3 cases with massive calcifications （3 cases）and fat-dense areas. Soft-tissue masses were showed mild or moderate enhancement on contrast-enhance CT scans, Conclusion The tumor showed isolated large soft tissue mass with irregular massive calcifications and fat-dense, soft-tissue component enhanced, which were considered to be typical CT manifestation of retroperitoneal malignant mesenchymoma. Soft tissue masses without calcification could not be differentiated from other mesenchymal tumors.