1. Congenital arachnoid Lumbar extradural arachnoid cyst presenting as a conus lesion in a man aged 77 years cysts and their differential diagnosis;I Shaw CM, Alvord Jr EC,1977
2. Spinal nised but uncommon cause of spinal cord compression. They typically present as a slowly progressive thoracic cord lesion in a young adult.'2 Extradural cysts at the thoracolumbar region are very rare.34 We report a case of extradural arachnoid cyst arachnoid cysts: clinical and radiological correlation with prognosis;Kendall, B.E.; Valentine, A.R.; Keis, B.;Neuroradiology,1982
3. Extradural cysts of the spinal canal;Gortvai, P.;J Neurol Neurosurg Psychiatry,1963
4. Lumbar extradural cyst;Glasauer, F.E.;Neurosurg; which presented as a very slowly progressive,1966
5. Spinal arachnoid cysts. Report of six An active 77 year old man presented with a cases;Palmer, J.J.,1974