Spinal intradural arachnoid cysts located anterior to the cervical spinal cord Report of two cases and review of the literature

摘要: The authors describe two rare occurrences of radiographically, surgically, and pathologically confirmed spinal intradural arachnoid cysts (not associated with additional pathological entities) that were located anterior to the cervical cord. These lesions have been reported previously in only eight patients. patients described this report young adults who presented progressive spastic tetraparesis shortly after sustaining mild trauma whom no neurological deficit or bone fracture was demonstrated. presence an cyst detected on postcontrast computerized tomography (CT) myelography magnetic resonance imaging; both diagnostic tools correctly characterized cystic nature lesion. Plain radiography, plain tomography, contrast-enhanced CT scans not diagnostic. In cases a laminectomy performed, wall excised fenestrated subarachnoid space. Postoperatively, made complete recoveries. Based review literature, canal may be classified as either extra- intradural. Intradural usually arise posterior cord thoracic spine region; however, these very rarely develop region. pathogenesis is unclear, although congenital, traumatic inflammatory causes postulated. believe formation cannot explained by simply one mechanism because, some cases, there has accidental iatrogenic association congenital lesions. They also note extremely disorder cause myelopathy; postoperative prognosis good.