title: Chronic pain syndrome caused by a Bird's Nest filter: first case report.
abstract: OBJECTIVE
  To report the first case of a Bird's Nest IVC filter causing a chronic pain syndrome lasting 13 years through IVC wall penetration and subsequent break off of one of the filter struts.
  
  
  RESULTS
  A 43-year-old female presented with a 13-year history of abdominal pain following uneventful insertion of a Bird's Nest vena cava filter through a right internal jugular percutaneous approach. A year following the procedure, CT scan revealed one arm of the filter to be outside IVC borders. Nine years from the date of insertion the nature of the pain changed acutely following a five feet jump to more localized RUQ pain worse with twisting movements. A CT scan showed the strut to have pierced the IVC wall and penetrated the Unicate process of pancreas. Plain x-rays taken at different times in February 2006 showed one of the struts to be free floating in the peritoneal cavity. The floating strut was removed surgically from the wall of the Ileum. Postoperative recovery was uneventful and the patient was discharged pain free three days later.
  
  
  CONCLUSIONS
  Chronic pain is an added complication of BNF devices. Although rare, it further emphasizes the need for long-term follow up of patients with IVC filters.
authors.affiliation: Vascular Unit, Waikato Hospital, Menzies Building, Level 4, Hamilton 3200, New Zealand. drbasheer30@yahoo.com
authors.forename: Mamoun Ahmad
authors.initials: MA
authors.lastname: Al-Basheer
authors.forename: Mark
authors.initials: M
authors.lastname: Hamilton
authors.forename: Chris
authors.initials: C
authors.lastname: Holdaway
mesh_terms: D015746:Abdominal Pain / Q000000981:diagnostic imaging / Q000209:etiology* / Q000601:surgery*; D000328:Adult; D002908:Chronic Disease; D020878:Device Removal; D005260:Female; D006801:Humans; D014057:Tomography, X-Ray Computed; D016306:Vena Cava Filters / Q000009:adverse effects*