[Tracheal compression revealing a cold mediastinal abscess of Pott's disease origin].

The authors report the observation of a cold mediastinal abscess during a dorsal Pott disease, revealed by a tracheal compression. In relation with the unusual localization, they recall the main characteristics of cold chest abscesses, secondary or apparently primitive, deep or superficial, parietal but rarely mediastinal, and discuss as to their origin : bone, rib vertebra or lymph node. Modes of medical, or surgical treatment are envisaged.