Frontal sinus mucopyocele in cystic fibrosis.

This report summarizes the treatment of two patients with cystic fibrosis and frontal sinus mucopyocele. The first patient, an 18-year-old boy, had a 1-year history of a proptosis of the left eye. The second patient, a 28-year-old woman, had a 3-month history of intermittent diplopia. In both cases, the frontal sinus mucocele was diagnosed by computed tomographic scans; both were successfully treated with an osteoplastic flap and fat obliteration of the frontal sinus. When a patient with cystic fibrosis presents with a history of unilateral proptosis, diplopia, or frontal headaches, a paranasal sinus mucocele should be suspected.