Azygous lobe presenting as a posterior mediastinal mass in a 2-year-old boy

Posterior mediastinal masses encompass a varied group of surgical lesions t hat include malignant diseases as well as the anatomic malformations of fou r organ systems. The authors report on a 2-year-old child with a posterior mediastinal mass who was found at thoracotomy to have a chronically infecte d "hepatized" azygous lobe of the right lung. The I authors review current literature on this topic as well as the embryogenesis of azygous lobes. J P ediatr Surg 33:1829-1830. Copyright (C) 1998 by W.B. Saunders Company.