Interstitial lung disease and adult-onset Still's disease.

Adult-onset Still's disease is an uncommon rheumatological syndrome with a diversity of signs and symptoms. Pulmonary manifestations described are pleuritis and usually transient radiologic infiltrations. The patient presented in this case report had biopsy-proven lung fibrosis when adult-onset Still's disease was diagnosed. Three years after diagnosis, the patient developed clinical signs of the interstitial lung disorder. Radiological and histological progression was observed. Other causes of interstitial lung disorders were excluded. Clinicians should be aware that interstitial lung disease can be a complication of adult-onset Still's disease and can compromise the clinical status of the patient.