原发性腹膜后肿瘤的影像学诊断

Imaging Diagnosis of Primary Retroperitoneal Tumors

目的：原发性腹膜后肿瘤来源复杂，周围脏器多。旨在探讨影像学检查的诊断价值。材料与方法：回顾性分析４６例病理证实的腹膜后肿瘤的Ｘ线、ＣＴ及超声表现，并与手术所见作对照分析。结果：超声及ＣＴ的定位诊断准确率分别为８５％和９２％。良性与恶性肿瘤的大小无显著差异（Ｐ＞０．０５）。囊性肿瘤均为良性，囊实性及实性在良恶性肿瘤中均可见。瘤体钙化可见于畸胎瘤、海绵状血管瘤及神经母细胞瘤；脂肪密度见于脂肪瘤或脂肪肉瘤。结论：Ｂ超及ＣＴ具较高的定位诊断价值。ＣＴ可较好地显示肿瘤的境界及质地，对腹膜后肿瘤的定性诊断有一定的帮助。

Objective The purpose of this article is to evaluate the diagnostic value of imaging examination in primary retroperitoneal tumors in which the origin is complex. Materials and Methods:The findings of radiography,sonography and CT in 46 patients with primary retroperitoneal tumor were reviewed and correlated with surgical finding.Results:The accuracy of location of tumor was 85%by sonography.and that of CT was 92%;there was no statistically sigificant difference between benign and malignant(P>0.05);cystic tumor was beign;cystic parenchymatous and parenchymatous tumor may be either of benign or malignant;calcification of tumor was found in teratoma,carvenous hemangioma,and neuroblastoma;fat density presented in lipoma and liposarcoma,Conclusion:Sonography and CT are very valuable in the level diagnosis of primary retroperitoneal tumors where the nature, size, and the contour of the tumor is showed distinctly by CT.