[Results of mediastinoscopy]

The authors study the results of a series of 536 mediastinoscopies performed by P. Humbert. Out of 239 mediastinal tumours, 206 had a history done. Out of 200 bronchial cancers, 123 pathological diagnosis were made. The recommendation of mediastinoscopy in bronchial cancers is discussed. Joining their experiences. P. humbert and H. Longefait report a positive percentage of 86% out of 902 examinations.