[Lung hematomas (author's transl)]

The peculiarity of lung hematomas is due to the association of two types of lesions: vascular ruptures and alveolar ruptures. Six original observations are associated to 68 others published by various authors in a detailed general review. The main characteristics are radiological, with the following stages: 1) diffuse confusion giving a widespread picture of a low density and imprecise outline, 2) constituted hematoma with a dense picture with clear cut outline of late diagnosis, 3) less frequently aero-hydric pictures. Evolution takes place by slow spontaneous resorption which does not always require surgery.