As a result of the introduction of endoscopic sinus surgery, together with improvements in diagnostic radiology, it is now possible to marsupialize the majority of paranasal sinus mucoceles. We present a review of our management of 34 consecutive mucoceles, of which 22 were approached endoscopically. We discuss the presenting features and radiological findings in these patients, and the surgical techniques employed. At review, two patients have had a recurrence; both had previously had drainage of their mucocele by an external approach. One was then managed by further external surgery and the other endoscopically. There were no significant complications following endoscopic surgery with a follow-up of 6 months to 3 years. We suggest what should be the contraindications to an endoscopic approach.