椎管内硬膜内、外淋巴瘤MR影像表现

MR imaging of spinal intradural and epidural lymphoma

目的 探讨椎管内硬膜内外淋巴瘤MRI表现。方法 7例经手术或病理证实的淋巴瘤患者行MRI检查。结果 硬膜外淋巴瘤多为梭形等T1,等或稍长T2信号 ,轴位扁平状环绕脊髓生长 ,较均匀轻中度强化 ,可累及相邻脊椎或硬膜、脊髓。髓内淋巴瘤表现为病变脊髓肿胀 ,长T1等长混杂T2信号 ,增强后可见明显强化肿块。硬膜内侵犯表现为硬膜囊内弥漫均匀等T1稍长T2信号病灶 ,中等强化。结论 MRI是椎管内硬膜内、外淋巴瘤最佳检查方法 ;硬膜内。

ObjectiveTo study the MR appearance of spinal intradural and epidural lymphoma. MethodsSeven patients with spinal lymphoma (3 intradural, 4 epidural) underwent MR examination at 1.0 T. All patients were proved by operation or biopsy pathology. ResultsEpidural lymphoma often presented as fusiform, isointense on T1WI and slight hyperintense on T2WI, flat form wraped spinal cord in axial image, slight or medium homogenous enhancement. Involvement of adjacent vertebrae or hard membrane and spinal cord were found in 3 cases. Marrow tumor often showed spinal cord swollen, inhomgeneous hypointense on T1WI and mixed iso hyperintense on T2WI, slight inhomogenous enhancement and a obviously enhanced mass inside and without syringomyelia. An intradural mass showed diffused distributed lesion, homgeneous isointense on T1WI and slight hyperintense on T2WI, intermediate homogenous enhancement. ConclusionMR imaging is the best method in detection of spinal intradural and epidural lymphoma. Either spinal intradural or epidural lymphoma has certain characteristics in MR imaging.