脊髓星形细胞瘤的MRI表现

MRI appearance of spinal cord astrocytomas

目的:探讨脊髓星形细胞瘤在MRI中的影像表现,提高对该疾病的认识。方法:回顾分析12例经手术和病理证实的脊髓星形细胞瘤的磁共振影像表现。结果:5例病灶位于颈髓内,6例位于胸髓内,1例位于脊髓圆锥内;4例位于脊髓中央,8例位于脊髓周边部位。病灶平均长径为5.3 cm。平扫T1WI检查中4例表现为稍低信号,3例表现为等信号,5例表现为等、低混杂信号;T2WI检查中,10例表现为高信号,2例表现为高低混杂信号。增强扫描病灶实体部分10例出现强化。8例病灶边界显示不清晰,4例显示清晰。6例见囊变。结论:磁共振成像对髓内星形细胞瘤的定位和定性具有重要的价值。

Objective：To study the MR appearance of the spinal cord astrocytomas, and improve the understanding of this disease. Methods：The MR finding of 12 cases of spinal cord astrocytomas which were proved by operation and pathology were reviewed. Results：Five cases were located in cervical spinal cord, 6 cases were located in thoracic spinal cord, 1 case was located in conus medullaris, 8 cases were located eccentrically, 4 cases were located in the centre of spinal cord. The average length of tumors was 5.3cm. On T1 weighted image, 4 cases showed slightly hypo-intense,3 cases showed isointensity, 5 cases showed mixed iso-hypointense; on T2 weighted image, 10 cases showed hyper-intense,2 cases showed mixed hyper-hypointense. After enhancement, 10 cases exhibited enhancement, 8 cases were ill-defined, and 4 cases were well-defined. Cysts were seen in 6 cases. Conclusion： MRI plays an important role in the localization and qualitation to the spinal cord astrocytomas.