We had an interesting case in the clinic last week. A 55 year old woman came in with left facial swelling which had been worsening for 2 years. She had a hard lump on her face. You can see in the sag reformat where I marked it with a bb. The coronal reformat shows the pathology, which is a large mucocele measuring 4.5 cm x 3.4 cm. in the left maxillary sinus. The mucocele is eroding the inferior orbital wall, medial maxillary wall and a posterior tooth root. Mucoceles are benign mucous filled sinus masses. They are usually found in the frontal sinuses and are less common in the maxillary sinuses (less than 10% of all cases). They are thought to be caused by drainage problems, usually as a result of chronic infections, allergies, trauma, or previous surgery. They are treated with endoscopic surgery and do not tend to recur after removal. Since this is the first one I've seen it was interesting to me!!
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