Figure 2).

Chest x-ray of a seven-year-old boy with primary ciliary dyskinesia before (A) and after (B) hospitalization for aggressive medical management of a respiratory exacerbation. There had been a slowly increasing productive cough with a decline in lung function before hospitalization. Therapy in hospital consisted of chest physiotherapy and intravenous antibiotics. Lung function (forced expiratory volume in 1 s) improved from 45% predicted to 85% predicted after 10 days of therapy