Unilateral hyperlucent lung. Patent ductus arteriosus coexisting with bronchial carcinoid.

We report an unusual case of patent ductus arteriosus (PDA) co-existing with bronchial carcinoid. The initial radiographic presentation was hyperlucent lung. Causes and possible mechanisms of unilateral hypoperfusion of the lung are reviewed briefly. Useful diagnostic modalities in evaluating a hyperlucent lung are also discussed.