Division of Neuroradiology, University of British Columbia, Vancouver General Hospital, Vancouver, BC V5Z 1M9, Canada.
Br J Radiol. 2010 Jan;83(985):e18-21. doi: 10.1259/bjr/66268641.
We present the case of a 28-year-old man with an unusual aetiology of lipid-dense material in the subarachnoid space. CT of the head at presentation was normal. MRI of the spine revealed a defect in the dura at L5/S1, with avulsed left L5 and S1 nerve roots. Haematoma and marrow fat were observed in close relation to the dural tear adjacent to the sacral fracture. Head CT and MRI subsequently demonstrated new lipid-dense material and haemorrhage in the subarachnoid space after sacral instrumentation, presumably owing to transthecal displacement of fatty marrow.
我们报告一例 28 岁男性患者，其蛛网膜下腔存在不寻常的脂类物质病因。头部 CT 检查在初始时正常。脊柱 MRI 显示 L5/S1 硬脑膜缺陷，左侧 L5 和 S1 神经根撕脱。血肿和骨髓脂肪与紧邻骶骨骨折的硬脑膜撕裂处密切相关。头部 CT 和 MRI 随后显示在骶骨固定后蛛网膜下腔出现新的脂类物质和出血，推测是由于脂肪骨髓经硬脊膜移位所致。
