Sphenoethmofrontal mucocele.
D002648:Child; D005005:Ethmoid Sinus; D005626:Frontal Sinus; D006801:Humans; D008297:Male; D009078:Mucocele / Q000000981:diagnostic imaging*; D010254:Paranasal Sinus Diseases / Q000000981:diagnostic imaging*; D011859:Radiography; D013101:Sphenoid Sinus