Postpneumonectomy-like syndrome in an infant with right lung agenesis and left main bronchus hypoplasia.

We report a 1-year-old child born with agenesis of the right lung who sustained an episode of acute respiratory failure related to a postpneumonectomy-like syndrome, with severe mediastinal shift and subsequent stretching and stenosis of the left main bronchus. The insertion of an expandable prosthesis in the right empty pleural space markedly improved the patient's clinical condition.