[Idiopathic unilateral hyperlucent lung (analysis of 11 cases)].

11 cases of idiopathic unilateral hyperlucent lung were reported: The clinical pictures and X-ray findings were analysed. The main X-ray changes were abnormal hyperlucency of the affected lung or lobe while the size of the hyperlucent lung was normal or smaller than the contralateral side. The hilar shadow and vascular markings fine and decreased During respiration, the volume of the affected lung remained constant but the mediastinum shifted to the affected side on inspiration and away from it on expiration. The affected lung retained its radiolucency on expiration. The broncho-pulmonary angiogram, lung CT scan and pulmonary vascular tomograph were studied. The clinical pictures, etiology, pathology, X-ray diagnosis and differential diagnosis were discussed.