title: Casual recognition of an azygous continuation of the inferior vena cava in a patient with lung cancer.
abstract: Anomalous continuation of the inferior vena cava with an azygous vein is a rare vacular anomaly. The enlarged venous system may simulate adenopathies or mediastinal and retroperitoneal masses on the radiographs. We describe the case of a patient with lung cancer - a pathological condition which may cause adenopathies at these sites - and a dilated azygous-hemiazygous system resulting from failure of formation of the hepatic segment of the inferior vena cava.
authors.affiliation: Department of Pneumology, University Hospital 'La Fe', Valencia, Spain.
authors.forename: M A
authors.initials: MA
authors.lastname: Martínez García
authors.forename: A
authors.initials: A
authors.lastname: Pastor
authors.forename: D
authors.initials: D
authors.lastname: Ferrando
authors.forename: M L
authors.initials: ML
authors.lastname: Nieto
mesh_terms: D000230:Adenocarcinoma / Q000175:diagnosis / Q000473:pathology*; D000368:Aged; D001401:Azygos Vein / Q000002:abnormalities*; D006801:Humans; D008175:Lung Neoplasms / Q000175:diagnosis / Q000473:pathology*; D008279:Magnetic Resonance Imaging; D008297:Male; D014057:Tomography, X-Ray Computed; D014682:Vena Cava, Inferior / Q000002:abnormalities*