title: Transient syringomyelia leading to acute neurological deterioration after repair of a lipomyelomeningocele: case report.
abstract: OBJECTIVE
  Transient paraplegia in the immediate postoperative period after lipomyelomeningocele repair is uncommon and is not discussed in the literature. We present the unique case of a patient who developed transient paraplegia 48 hours after lipomyelomeningocele repair attributable to the acute development of a thoracic syrinx.
  
  
  METHODS
  At birth, the patient was noted to have a large skin-covered mass in the lumbosacral region. On neurological examination, both iliopsoas and quadriceps exhibited 3/5 motor function, and the plantar flexors and dorsiflexors exhibited 1/5 motor function. Urodynamic studies were normal. Magnetic resonance imaging demonstrated the presence of a lipomyelomeningocele associated with tethering of the spinal cord in the lumbosacral region.
  
  
  METHODS
  At 5 months of age, the patient underwent repair of the lipomyelomeningocele. After surgery, the patient developed progressive paraplegia along with bowel and bladder dysfunction. Given the concern about a postoperative hematoma resulting in cauda equina syndrome, the patient returned to the operating room for a wound exploration. No compressive lesion such as a hematoma was found at surgery. A postoperative magnetic resonance imaging scan obtained afterward, however, demonstrated the presence of a large thoracic syrinx.
  
  
  CONCLUSIONS
  Syrinx formation can occur as early as 48 hours after lipomyelomeningocele repair, leading to progressive lower extremity weakness and bowel and bladder incontinence. In the immediate postoperative period, an acute syrinx can mimic cauda equina syndrome, and a magnetic resonance imaging scan is necessary to distinguish between these two entities. In this patient, the syrinx was transient and resolved without a shunting procedure.
authors.affiliation: Division of Pediatric Neurosurgery, Department of Neurosurgery, New York University School of Medicine, New York, New York, USA. postn01@med.nyu.edu
authors.forename: Nicholas H
authors.initials: NH
authors.lastname: Post
authors.forename: Jeffrey H
authors.initials: JH
authors.lastname: Wisoff
authors.forename: Charles H
authors.initials: CH
authors.lastname: Thorne
authors.forename: Howard L
authors.initials: HL
authors.lastname: Weiner
mesh_terms: D000208:Acute Disease; D006801:Humans; D007223:Infant; D008161:Lumbosacral Region / Q000002:abnormalities; D008279:Magnetic Resonance Imaging; D008591:Meningomyelocele / Q000473:pathology / Q000601:surgery*; D010264:Paraplegia / Q000209:etiology / Q000473:pathology; D011183:Postoperative Complications / Q000473:pathology* / Q000601:surgery; D012086:Reoperation; D013595:Syringomyelia / Q000209:etiology* / Q000473:pathology / Q000601:surgery