PLAIN FILM FINDINGS IN AZYGOS CONTINUATION OF THE INFERIOR VENA CAVA

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Abstract
Two cases are reported of the preangiographic plain film diagnosis of azygos continuation of the inferior vena cava in children. The association of a right mediastinal mass (between the trachea and right mainstem bronchus) and of right paravertebral pleural deviation in a patient with a normal left aortic arch strongly suggests this venous anomaly. There is a high incidence of errors in abdominal situs. The relationship to asplenia and polysplenia is discussed. Since the anomaly may be isolated and be mistaken for a tumor mass, thoracotomy can be avoided if the diagnosis is suspected and inferior vena cavography performed.

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