Agenesis of the lung.

Agenesis of the lung is extremely rare. Developmental defects of the lung are usually associated with other congenital malformations. Half of all reported patients die either at birth or within the first 5 yrs of life. We report a case of right lung agenesis with absence of the left kidney, and fusion anomaly between ribs 4 and 5 on the left hemithorax.