Ilkko E, Reponen J, Ukkola V, Koivukangas J
Department of Radiology, Oulu University Hospital, Finland.
Clin Radiol. 1998 Mar;53(3):221-5. doi: 10.1016/s0009-9260(98)80106-2.
The authors present four cases where foreign bodies within the central nervous system had spontaneously migrated. Two of these were surgical clips and two were bullets. The clips seemed to pass intradurally into the lumbar region with minor or no symptoms. Possible explanations for the migration are the circulation of CSF and the gravity. A new observation was that an infection may develop at the site where the foreign body had been situated before migration. From the clinical point of view, the removal of foreign bodies from the intradural space is not indicated, if the patient has no connected symptoms.
作者报告了4例中枢神经系统内异物自发迁移的病例。其中2例为手术夹，2例为子弹。手术夹似乎经硬膜内进入腰椎区域，症状轻微或无症状。迁移的可能原因是脑脊液循环和重力作用。一项新的观察结果是，异物迁移前所在部位可能会发生感染。从临床角度来看，如果患者没有相关症状，则不建议从硬膜内空间取出异物。
