The endoscopic approach to the lateral accessory sphenoid sinus.

In summary, an interesting case of an accessory parasphenoid sinus mucocele in a 10-year-old girl is reported. By choosing an endoscopic approach, hearing and balance were preserved, and an external sinus or neurosurgical procedure avoided. The surgery was done on an outpatient basis, with minimal postoperative discomfort and no complications. The mucocele was adequately drained and there has been no recurrence over the following 12 months.