[Interferences between pulmonology and nephrology: renal osteodystrophy--multiple brown tumors].

Renal osteodystrophy (brown tumors) represents a complication of chronic renal failure, especially in patients receiving hemodialysis treatment. It is determined by the secondary hyperparathyroidism. The incidence ranges between 1.5 and 13%. These lesions occur most often in the pelvis and ribs; both of them are present in our patient. Thoracic involvement brings the patient to the specialist in lung diseases. The differential diagnosis is instructive.