
A sinus mucocele refers to a pocket or pockets of mucous that are trapped within one or more of the sinuses. Mucoceles usually occur in a specific part of the sinuses and are commonly a result of facial trauma or failed sinus surgery. Patients experiencing intermittent yellow nasal drainage or facial pressure in one part of the face, who have also had failed sinus surgery or have experienced facial trauma may be suffering from sinus mucoceles.