Chronic recurring sinusitis (CRS) is a difficult diagnosis to make in the paediatric patient. However, increased awareness by physicians and improved technology are contributing to an increasing frequency of this diagnosis. Children with their immature development of the paranasal sinuses and immunological systems present special problems in the treatment of CRS. Concern must be given to potential alteration of the development of the paranasal sinus system and tooth buds in the maxilla by a surgical procedure in children. Various surgical procedures have been recommended in the past in the treatment of CRS failing medical management. A review of 124 paediatric patients undergoing endoscopic endonasal sinus surgery using the technique of Messerklinger and Stammberger in the treatment of CRS over an 11-year period is presented. A detailed questionnaire regarding patient's satisfaction and symptomatic relief has been sent to all patients. The results indicate a successful outcome from this technique and a high level of patient satisfaction. No complications such as CSF leak or orbital injury have been encountered, and no evidence of altered facial growth and development has been noted. We find the endoscopic endonasal technique to be a safe and effective method in the treatment of children with CRS failing medical management.