title: Ultra-early MRI showing no abnormality in a fall victim presenting with tetraparesis.
abstract: METHODS
  Case report.
  
  
  METHODS
  Department of Neurosurgery, Sapporo Azabu Neurosurgical Hospital and Department of Neurosurgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan.
  
  
  METHODS
  A patient presented to us with complete C4 tetraplegia after a 3-m fall. MRI performed 120 min after his fall showed spinal canal stenosis due to disk protrusion at the C3/4 level without spinal cord signal changes on T1- and T2-weighted images. He underwent laminoplasty between C2 and C6. Intraoperative ultrasound, performed 6 h after his fall, disclosed a hyperechoic lesion at the C3/4 level of the cervical cord; postoperative T2-weighted MRI, obtained at 8 h after his fall, showed high intensity at the same level.
  
  
  CONCLUSIONS
  In patients with cerebral infarction, approximately 6 h between the insult and the acquisition of T2-weighted MRI are required to detect signal changes. We postulate that the time course on MRI scans obtained immediately after spinal cord injury is similar in patients with spinal cord injury and cerebral infarction and suggest that the absence of spinal cord abnormalities in the ultra-early post-injury stage is not always predictive of a good prognosis.
authors.affiliation: Department of Neurosurgery, Sapporo Azabu Neurosurgical Hospital, Sapporo, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Aoyama
authors.forename: K
authors.initials: K
authors.lastname: Hida
authors.forename: M
authors.initials: M
authors.lastname: Akino
authors.forename: S
authors.initials: S
authors.lastname: Yano
authors.forename: Y
authors.initials: Y
authors.lastname: Iwasaki
authors.forename: H
authors.initials: H
authors.lastname: Saito
mesh_terms: D000058:Accidental Falls; D000368:Aged; D002574:Cervical Vertebrae; D019299:Decompression, Surgical; D006801:Humans; D007405:Intervertebral Disc Displacement / Q000150:complications / Q000601:surgery; D007432:Intraoperative Period; D008279:Magnetic Resonance Imaging; D008297:Male; D011782:Quadriplegia / Q000209:etiology / Q000473:pathology*; D013119:Spinal Cord Injuries / Q000175:diagnosis* / Q000209:etiology; D013997:Time Factors; D014463:Ultrasonography