Maxillary sinus mucopyoceles.

Mucopyoceles of the maxillary sinus are seen rarely, and their origin has been the subject of much controversy. Three cases are reported herein, accompanied by a review of the literature, to clarify some aspects of their cause, diagnosis and treatment. It has been concluded that the most common cause of mucopyoceles is trauma, whether accidental or iatrogenic (ie, due to surgery performed on the affected sinus), and that the best surgical approach is a wide Caldwell-Luc sinusectomy.