Generally, two-thirds of mucoceles or mucopyoceles occur in the frontal sinuses, one-third in the ethmoidal sinuses, and extremely rare in the maxillary or sphenoidal sinuses and concha bullosa.

• 摘要黏液囊肿或黏液脓性囊肿约三分之二发生于额窦，三分之一发生于前筛窦，而发生于蝶窦、后筛窦及上额窦者并不常见，至发生于中鼻甲泡者则更少。