椎管内硬膜外原发恶性淋巴瘤的MRI表现

The MRI Characteristics of Primary Malignant Lymphoma in the Vertebral Canal and Extradual Space

目的 :分析椎管内硬膜外原发性恶性淋巴瘤MRI特点 ,以提高诊断正确性。材料和方法 :经手术病理证实的椎管内硬膜外原发性恶性淋巴瘤 6例 ,男 4例 ,女 2例 ;所有病例均有MR扫描及增强扫描。结果 :MR表现为长达数个椎体的椎管内硬膜外梭形占位 ,呈等T1或略短T1,长T2信号 ;与脊髓间可见低信号硬脊膜线 ,3例环绕脊髓生长 ,3例为偏于一侧 ,2例穿破低信号硬脊膜线侵蚀脊髓 ,1例沿神经根向椎管外生长 ;增强扫描 ,占位呈均质或略显混杂重度增强。结论 :MRI能全面观察肿块及脊髓情况 ,为临床诊断提供有力的影像学依据。

Purpose: To analyze the MRI characteristics of primary malignant lymphoma in vertebral canal and extradual space. Materials and Methods: 6 patients of vertebral canal and extradual primary malignant lymphoma confirmed surgically and pathologically underwent MR imaging. The study group consisted of 4 males and 2 females. Results: In all these patients, the lession appeared as fusiform mass, some of them extending to several vertebra, the signal appeared as isointense and hyperintense on T1WI and hyperintense on T2WI imagings. There was a partition with low-signal intensity between the tumor and spinal cord. Lession were confined around spinal cord in 3 cases, to the hemi lateral in 3 cases, involved spinal cord in 2 and along the nerve root out of spinal canal in 1. All the fusiform lesions appeared homogeneous or slight inhomogeneous enhancement after administration of Gd-DTPA. Conclusion: MRI examination makes it possible to wholly observe the conditions of tumour and spinal cord, and it is a reliable method for clinical diagnosis of the lymphomas.