[Giant lobar emphysema. The cause of a compressive hemithoracic opacity in a newborn infant].

The authors describe a case of congenital lobar emphysema of the upper right pulmonary lobe discovered at birth with an opaque hemithorax and a shift of mediastinum. The diagnosis was confirmed by a CT-scan. A lobectomy was performed at 6 weeks of age. The different diagnosis and physiopathological mechanisms are discussed.