A retrospective study was carried out of children undergoing Nissen fundoplication and pyloroplasty for the correction of gastro-oesophageal reflux. Twenty children (thirteen males, seven females) aged 8 months to 12 years underwent surgery over a 10 year period. Forty per cent were mentally retarded. Presentation was failure to thrive in 19 (95 per cent), recurrent vomiting in 18 (90 per cent) and haematemesis in 14 (70 per cent). Four children had Barrett's oesophagus. There were no operative or perioperative mortalities. Follow-up (mean period 3 years, 9 months) revealed no further symptoms of reflux. The 'normal' children gained weight postoperatively whereas the 'retarded' group did not. Adhesion obstruction (10 per cent) was the major late postoperative complication. Regression of Barrett's epithelium was noted endoscopically. 'Gas-bloat' syndrome, a major complication following fundoplication, was not encountered.