[Spontaneous pneumomediastinum and idiopathic pulmonary fibrosis].

The association between pulmonary fibrosis and pneumomediastinum is infrequent. Computed tomography is the suited method for the detection of small pneumomediastinum, which is difficult to detect by chest radiography. A case of idiopathic pulmonary fibrosis, with frequent and violent cough, with pneumomediastinum and cervical subcutaneous emphysema, without pneumothorax, probably caused by rupture of bullae is presented. The outcome was favourable with symptomatic treatment.