[Hypertrophic osteoarthropathy in a patient with cystic fibrosis].

An 11-year-old boy with cystic fibrosis additionally suffered from hypertrophic osteoarthropathy. Despite a mild pulmonary involvement the polyarthritis was surprisingly long-standing and resistant to antiinflammatory treatment. The arthropathy completely disappeared within two months after antibiotic therapy of the bronchopulmonary staphylococcus infection.