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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。
Objective: To study the CT and MRI features of retroperitoneal schwannomas and the differentiation of benign and malignant lesions. Methods: Thirteen cases were confirmed by pathology in this group. There were 10 males and 3 females with an average age of 45.0 years. Of the 13 cases, 4 were benign and 9 were malignant. CT scanning was performed in 11 cases, including CT enhancement in 4 cases and MRI scan in 4 cases. RESULTS: Tumors were more common in the paraspinal region and the lateral pelvic space. Tumor 12/13 had uneven texture, 9/13 had obvious cystic area, and no lymph node metastasis was seen. The benign individuals were smaller and the margins were smooth; the malignancies were larger and irregularly nodular. 3/9 CT scans showed calcification, 4/4 CT scans were irregular, and 7/9 patients showed invasive features. 3/9 Cases relapsed and 4/9 patients had metastases. Conclusion: The occurrence of retroperitoneal space, with obvious cystic signs, should be considered in the diagnosis of this disease. Imaging features can identify the benign and malignant nature of the tumor.