title: Lumbar vertebral haemangioma causing pathological fracture, epidural haemorrhage, and cord compression: a case report and review of literature.
abstract: BACKGROUND
  Vertebral haemangiomas are recognized to be one of the commonest benign tumours of the vertebral column, occurring mostly in the thoracic spine. The vast majority of these are asymptomatic. Infrequently, these can turn symptomatic and cause neurological deficit (cord compression) through any of four reported mechanisms: (1) epidural extension; (2) expansion of the involved vertebra(e) causing spinal canal stenosis; (3) spontaneous epidural haemorrhage; (4) pathological burst fracture. Thoracic haemangiomas have been reported to be more likely to produce cord compression than lumbar haemangiomas.
  
  
  RESULTS
  A forty-nine year old male with acute onset spinal cord compression from a pathological fracture in a first lumbar vertebral haemangioma. An MRI delineated the haemangioma and extent of bleeding that caused the cord compression. These were confirmed during surgery and the haematoma was evacuated. The spine was instrumented from T12 to L2, and a cement vertebroplasty was performed intra-operatively. Written consent for publication was obtained from the patient.
  
  
  CONCLUSIONS
  The junctional location of the first lumbar vertebra, and the structural weakness from normal bone being replaced by the haemangioma, probably caused it to fracture under axial loading. This pathological fracture caused bleeding from the vascularized bone, resulting in cord compression.
authors.affiliation: Department of Trauma & Orthopaedics, University Hospitals of Leicester NHS Trust, Leicester, UK.
authors.forename: S
authors.initials: S
authors.lastname: Vinay
authors.forename: S K
authors.initials: SK
authors.lastname: Khan
authors.forename: J R
authors.initials: JR
authors.lastname: Braybrooke
mesh_terms: D005598:Fractures, Spontaneous / Q000175:diagnosis / Q000209:etiology*; D006391:Hemangioma / Q000150:complications* / Q000175:diagnosis; D006801:Humans; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging / Q000473:pathology*; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008875:Middle Aged; D013117:Spinal Cord Compression / Q000175:diagnosis / Q000209:etiology*; D013125:Spinal Neoplasms / Q000150:complications* / Q000175:diagnosis; D014057:Tomography, X-Ray Computed / Q000379:methods