title: Polymethylmethacrylate cement dislodgment following percutaneous vertebroplasty: a case report.
abstract: METHODS
  A case report is presented.
  
  
  OBJECTIVE
  To report a rare complication of delayed cement displacement following percutaneous vertebroplasty.
  
  
  BACKGROUND
  Although percutaneous vertebroplasty is considered a minimally invasive procedure, it may result in several complications. To our knowledge, this is the first report of delayed cement displacement after percutaneous vertebroplasty.
  
  
  METHODS
  A 69-year-old man with T12 osteoporotic compression fracture received percutaneous vertebroplasty. One month after surgery, the patient complained of progressive severe back pain, and roentgenographic image revealed a breakdown of the anterior cortex of the T12 vertebral body with anterior displacement of the bone cement.
  
  
  RESULTS
  The complication was solved by one stage anterior and posterior operation: thoracoabdominal approach with removal of the displaced cement and posterior instrumentation from T11 to L1. The severe back pain with associated weakness improved after surgery.
  
  
  CONCLUSIONS
  This complication is rare and likely to occur in treatment of osteoporotic vertebral fracture with avascular necrosis and anterior cortical defect.
authors: Department of Orthopaedic Surgery, Chang Gung Memorial Hospital, Taipei, Taiwan, Republic of China.
authors: Tsung-Ting
authors: TT
authors: Tsai
authors: Wen-Jer
authors: WJ
authors: Chen
authors: Po-Liang
authors: PL
authors: Lai
authors: Lih-Huei
authors: LH
authors: Chen
authors: Chi-Chien
authors: CC
authors: Niu
authors: Tsai-Sheng
authors: TS
authors: Fu
authors: Chak-Bor
authors: CB
authors: Wong
mesh_terms: D000368:Aged; D001416:Back Pain / Q000000981:diagnostic imaging / Q000209:etiology; D001843:Bone Cements / Q000009:adverse effects*; D006801:Humans; D008297:Male; D019060:Minimally Invasive Surgical Procedures / Q000009:adverse effects; D019904:Polymethyl Methacrylate / Q000009:adverse effects*; D011859:Radiography; D012867:Skin; D016103:Spinal Fractures / Q000000981:diagnostic imaging / Q000601:surgery*
chemical_list: D001843:Bone Cements; D019904:Polymethyl Methacrylate