In order to better define the outcome of patients with neonatal congenital diaphragmatic hernia (CDH), 17 patients between 3 and 19 years of age, among 34 survivors from 100 CDH have been re-examined clinically. All had a lung radiography, lung function studies, and radionuclide (Technetium 99m, Xenon 133) lung scans. Three patients suffered from asthma, 2 had recurrent bronchitis, 4 poor tolerance to effort, 3 gastrooesophageal regurgitation leading to endobrachyoesophagus and oesophagitis in one, 3 had scoliosis. Lung scans demonstrated hypoperfusion of the herniated side (less than 40%) in 6 patients. Chest films showed hypovascularisation on the herniated side. Lung function studies, performed in 4 of these 6 patients, showed a restrictive syndrome in 1 patient. Our results confirm those in the literature: perfusion is more altered than ventilation. Chest films at one year of age, completed if necessary by radionuclide lung scans, allow identification of children who have important pulmonary hypoplasia. These children need a regular follow-up: respiratory, digestive and orthopedic complications must be treated in order to preserve the respiratory function in adulthood.