[Mediastino-pulmonary localizations of sarcoidosis].

This study discusses mediastinal and pulmonary involvement in sarcoidosis. The main points of discussion are the clinical consequences of the histopathological changes of the disease, especially the alveolitis, the initial lesion preceding granuloma formation and, new methods of investigation such as measurement of the angiotensin converting enzyme, Gallium 67 scintigraphy and bronchoalveolar lavage. Assessment of the activity of the disease and the indications of steroid therapy are analysed with respect to these informations.