title: Preaortic iliac confluence (marsupial vena cava): report of 4 cases.
abstract: Congenital anomalies of the inferior vena cava (IVC) can represent a difficult for abdominal surgeries, and the radiologist must be aware even of the less common of these anatomical variations. Preaortic iliac venous confluence, also known as marsupial vena cava, is a rare congenital anomaly of the development of the IVC in which the IVC or the left common iliac vein is located anterior to the aortic bifurcation or the right common iliac artery. We report 4 cases of marsupial vena cava detected on multidetector computed tomography examinations in asymptomatic patients and discuss that this congenital anomaly can be recognized more frequently with the use of this new technique based on thinner images.
authors.affiliation: Department of Radiology, Medical School, University of Sâo Paulo, Sâo Paulo, Brazil. manoelrocha@usp.br
authors.forename: Manoel de Souza
authors.initials: Mde S
authors.lastname: Rocha
authors.forename: Rafael Burgomeister
authors.initials: RB
authors.lastname: Lourenço
authors.forename: Yoon Seung
authors.initials: YS
authors.lastname: Chang
authors.forename: Eloísa Maria Mello  Santiago
authors.initials: EM
authors.lastname: Gebrim
authors.forename: Giovanni Guido
authors.initials: GG
authors.lastname: Cerri
mesh_terms: D005260:Female; D006801:Humans; D007084:Iliac Vein / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014682:Vena Cava, Inferior / Q000002:abnormalities* / Q000000981:diagnostic imaging