[Tuberculous pyothorax. 28 cases].

Objectives: Despite the efforts in the fight against tuberculosis (Tb) and the decrease in its incidence, severe forms persist. Tubercular pyothorax (TP), which was a frequent complication, is still difficult to treat. We studied the epidemiological, diagnostic, therapeutic and progressive aspects of this particular localization.

[Primary malignant melanoma of the trachea. Apropos of a case].

Primary malignant melanoma of the lower airways is very rare. 24 cases have been collected over the past century. Our case was a patient of 52 years of age who had been discovered to have a tracheal tumour which was found to be a malignant melanoma and was treated with a Laser.

[Pneumomediastinum in dermatopolymyositis].

The authors report the occurrence of a pneumomediastinum occurring in a young female aged 25 who had already been under treatment for 3 years for dermatomyositis and who had a pulmonary involvement with fibrosis. This association did not seem fortuitous. The pneumomediastinum would be due to a cystic degeneration of the fibrosis producing "pseudoblebs".

[Eosinophilic pleural effusion].

Eosinophilic pleural effusion accounts for 5 to 10% of all clear liquid pleurisies. Its pathogenic significance is unclear and its relation to the causative diagnosis of pleural eosinophilia is diversely evaluated. In this study, 86 cases of eosinophilic pleural effusion observed at the Ariana Pneumophthisiology Hospital over a 5-year period are reviewed.