title: Bilateral inferior vena cava filter insertion in a patient with duplication of the infrarenal vena cava.
abstract: BACKGROUND
  Inferior vena cava (IVC) filter insertion is a commonly performed procedure for indications such as recurrent pulmonary emboli or contraindication to anticoagulation. Symptomatic duplication of the IVC is exceedingly rare with only a handful of cases being described in the literature.
  
  
  OBJECTIVE
  We report an unusual case of a patient with symptomatic duplication of the IVC.
  
  
  RESULTS
  A 53-year-old woman presented at our hospital for resection of a cerebral metastasis from a non-small cell lung cancer following a recent diagnosis of bilateral lower limb deep venous thrombosis. This required perioperative reversal of anticoagulation and IVC filter insertion. Conventional venography performed during filter insertion documented the existence of a duplicated IVC.
  
  
  CONCLUSIONS
  We present a case of a symptomatic duplication of the IVC requiring filter insertion. We review the developmental anatomy of the IVC along with the diagnostic findings and management strategies available.
authors.affiliation: Department of Radiology, Cork University Hospital, Wilton, Cork, Ireland. leong81@gmail.com
authors.forename: S
authors.initials: S
authors.lastname: Leong
authors.forename: F
authors.initials: F
authors.lastname: Oisin
authors.forename: J E
authors.initials: JE
authors.lastname: Barry
authors.forename: M M
authors.initials: MM
authors.lastname: Maher
authors.forename: C O
authors.initials: CO
authors.lastname: Bogue
mesh_terms: D000925:Anticoagulants; D000075202:Contraindications; D005260:Female; D006801:Humans; D033162:Incidental Findings; D008875:Middle Aged; D019919:Prosthesis Implantation; D016306:Vena Cava Filters; D014682:Vena Cava, Inferior / Q000002:abnormalities*; D020246:Venous Thrombosis / Q000628:therapy
chemical_list: D000925:Anticoagulants