Atypical pulmonary artery sling with diffuse-type pulmonary arteriovenous fistula

The case of a cyanotic infant with a rare combination of atypical pulmonary artery sling, imperforate anus, absence of the left kidney, interruption o f the inferior vena cava, left side hemihypertrophy and diffuse-type pulmon ary arteriovenous fistula is described. The clinical features were confusin g, because of compounding abnormalities involving the respiratory tract and pulmonary circulation. The diagnostic approach to the etiology of cyanosis is discussed and the embryonic origin of pulmonary artery sling is reviewe d.