title: Intramedullary cyst formation after removal of multiple intradural spinal arachnoid cysts: A case report.
abstract: BACKGROUND
  A rare cause of spinal cord compression is spinal arachnoid cysts. Symptoms are caused by spinal cord compression, however, asymptomatic patients have been also reported. Treatment options depend upon symptom severity and clinical course.
  
  
  METHODS
  We report the case of a 47-year-old patient who developed an intramedullary arachnoid cyst after removal of an intradural extramedullary cyst.
  
  
  CONCLUSIONS
  Surgery should be considered early in a symptomatic disease course. Longstanding medullary compression may reduce the possibility of neurological recovery as well as secondary complications such as intramedullary cyst formation.
authors: Department of Neurosurgery, IRCCS Galeazzi Hospital, Milan, Italy.
authors: Edvin
authors: E
authors: Zekaj
authors: Department of Neurosurgery, IRCCS Galeazzi Hospital, Milan, Italy.
authors: Christian
authors: C
authors: Saleh
authors: Department of Neurosurgery, IRCCS Galeazzi Hospital, Milan, Italy.
authors: Domenico
authors: D
authors: Servello
keywords: Complication; spinal arachnoid cyst; spinal cord compression