腹膜后恶性纤维组织细胞瘤CT诊断

目的：探讨腹膜后恶性纤维组织细胞瘤（MFH）CT表现及诊断价值。材料和方法：回顾性分析12例经手术或活检病理证实的后腹膜恶性纤维组织细胞瘤的临床和CT检查资料。结果：12例中，肿块平均最大径9．2cm，10例肿块形态不规则伴明显分叶，2例表现为椭园形。平扫CT值低于肌肉软组织10例，2例呈等密度或稍高密度，9例实质内明显坏死囊变，2例实质内可见钙化灶，3例破坏骨骼，1例累及肾脏，1例累及胰体、尾部。增强扫描肿块呈中－高度强化。对照手术病理结果，CT定位准确率75％，定性准确率41．67%。结论：腹膜后恶性纤维组织细胞瘤（MFH）CT表现为一定特征性，有助于协助临床诊断。

CT Diagnosis of Retroperitoneal Malignant Fibrous Histiocytoma

Purpose: To explore the CT findings of retroperitoneal malignant fibrous histiocytoma(MFH) and its value in diagnosis. Materials and Methods: Twelve cases of MFH proved by surgery or biopsy were examined with CT.The CT images and clinical data were retrospectively reviewed.Results: The findings shown on CT scan included:average maximal length(9.2cm);irregular lobulated contour in 10 cases,ovale in 2; hypodensity(compared with muscle) in 10 cases, iso - hyperdensity in 2, moderate - high enhancement after administration of contrast material in all cases; necrotic cavitation or cystic change in 9 cases; calcification in 2 cases; destruction of bone in 3 cases; involvement of kidney or pancrea in one each. The accuracy rates of CT were 75% for localization and 41.67% for qualitative diagnosis. Conclusion: CT scan can reveal the special features of MFH and is very helpful for clinical diagnosis.