Pediatric sinusitis. The role of endoscopic sinus surgery in cystic fibrosis and other forms of sinonasal disease. Functional endoscopic sinus surgery has altered the surgical treatment of sinus disease in adults. We report our experience with functional endoscopic sinus surgery in the pediatric population. Functional endoscopic sinus surgery was safe and effective and compared favorably with traditional surgery with regard to operative time, blood loss, and parental opinion. 