title: Spinal cord herniation into a congenital extradural arachnoid cyst causing Brown-Séquard syndrome. Case report.
abstract: This is a report of a patient who developed sharp intercostal pain and Brown-Séquard syndrome. Displacement of the spinal cord toward an extradural mass was noted at the T4-5 vertebral level on iophendylate myelography and metrizamide computerized tomography myelography. Multiple meningeal diverticular lesions of congenital origin were also found. Surgical correction of the spinal cord, which had herniated into a laterally located extradural arachnoid cyst and become incarcerated, resulted in a complete neurological recovery.
mesh_terms: D000328:Adult; D001099:Arachnoid / Q000473:pathology*; D003560:Cysts / Q000150:complications* / Q000151:congenital / Q000209:etiology; D004388:Dura Mater / Q000473:pathology*; D006429:Hemiplegia / Q000209:etiology*; D006801:Humans; D007405:Intervertebral Disc Displacement / Q000150:complications*; D008297:Male; D009192:Myelography; D012677:Sensation; D013118:Spinal Cord Diseases / Q000601:surgery; D013577:Syndrome