[Mediastinal-pulmonary sarcoidosis with unilateral pseudotumorous presentation. Apropos of a case].

We report a case of a patient of forty two years who was admitted with a chronic cough and had a left hilar "tumour". Scanning showed a hilar opacity with an air bronchogram. Fibreoptic bronchoscopy did not succeed in achieving a precise diagnosis, the biopsies showed no sign of malignancy. An open lung biopsy was necessary to establish the diagnosis of pulmonary mediastinal sarcoidosis with a pseudo-tumoral presentation and localised unilateral disease involving a segmental bronchus and the left upper lobe. There was a rapidly favourable outcome after treatment with steroids.