【摘要】 目的 :研究腹膜后神经鞘瘤的CT、MRI表现及良恶性鉴别。方法 :本组经病理证实 13例 ,男 10例 ,女 3例 ,平均年龄45 .0岁。 13例中良性 4例 ,恶性 9例。 11例进行了CT平扫 ,其中CT强化 4例 ;MRI扫描 4例。结果 :肿瘤多见于脊柱旁腹膜后区及侧盆间隙。肿瘤 12 / 13例质地不均匀 ,9/ 13例有明显囊变区 ,未见淋巴结转移。良性者较小 ,边缘光滑 ;恶性者较大 ,呈不规则结节状 ,3/ 9例平扫CT可见钙化 ,4/ 4例CT强化不规则 ,7/ 9例显示侵犯特征 ,3/ 9例术后复发 ,4/ 9例出现转移。结论 :腹膜后间隙发生 ,有明显囊变征象肿瘤应考虑本病诊断 ,影像学表现可鉴别肿瘤良恶性质。更多还原

【Abstract】 Objective:To study the CT and MRI findings of the retroperitoneal schwannoma,and differ the benign to malignant tumor.Methods:Thirteen cases of retroperitoneal schwnnoma proved by pathology were presented.There were ten male and three female,with an average age of 45.0 years old.Among those cases,four cases were benign tumors,and nine cases were malignant tumors.CT studies were obtained in eleven cases in which CT enhancement studies were done in four cases,MR studies in four cases.Results:Tumors were located in the lateral retroperitoneal space or in the lateral pelvic space.Heterogeneous density or signal intensity was presented in 12/13 cases.Cystis changes were showed in 9/13 cases.There was no any lymphatic adenopathy.For the benign lesion,small with well-demarcated round shape were demonstrated.But in malignant tumor,a big mass with irregular or nodular shape was found.Calcification was seen in 3/9 cases.Irregular enhancement was presented in 4/4 cases.Invasive characteristics were showed in 7/9 cases.Metastasis were in 4/13 cases.Conclusion:If a tumor occurs in the lateral retroperitoneal space,with cystic change,the diagnosis of retroperitoneal schwnnoma should be considered.CT and MRI can differ benign to malignant tumor. [更多还原