椎管内硬膜外海绵状血管瘤的MR表现

Spinal epidural cavernous hemangioma: MR findings

目的 探讨椎管内硬膜外海绵状血管瘤MR诊断价值。方法 回顾性分析 3例经病理证实的椎管内硬膜外海绵状血管瘤的MR表现 ,并复习相关文献。结果 3例椎管内硬膜外海绵状血管瘤中 ,2例位于胸椎 ,1例位于颈胸椎。 3例均沿脊椎纵轴生长 ,呈梭形或长条形 ;2例肿块“钳”状包绕、推挤相应水平的脊髓 ;3例均表现为T2 WI高信号 ,钆喷替酸葡甲胺 (Gd DTPA)增强扫描呈均匀一致的明显强化 ;2例肿瘤侵犯、压迫相邻的椎间孔并使椎间孔扩大 ,且经椎间孔突入椎旁间隙 ,呈“哑铃状”外观。 2例合并椎体血管瘤。结论 椎管内硬膜外海绵状血管瘤是非常少见的椎管硬膜外肿瘤 ,MRI是诊断此病的最佳方法 。

Objective To discuss MR findings of spinal epidural cavernous hemangioma. Methods Three pathologically proven cases of spinal epidural cavernous hemangioma were retrospectively reported. Their MR findings and relevant literatures were reviewed. Results The lesions were at the thoracic level ( n =2) or cervical thoracic level ( n =1). The mass was located in the epidural space and extended parallel with long axis of spine. It showed oval or shuttle shape and encircled and pushed the adjacent spinal cord ( n =2). In all cases, the mass showed hyperintense on T 2WI and homogeneous strong enhancement. Adjacent bony structure was eroded and intervertebral neural foramen, through which the mass infiltrated into paravertebral space, was widened ( n =2). Two cases were accompanied by hemangiomas of the vertebral body. Conclusion Spinal epidural cavernous hemangiomas are very rare tumors in the epidural space. MRI is considered the modality of choice for the diagnosis of this disease and MRI has relative characteristic findings.