Ossifying fibroma of the sphenoid.
D000328:Adult; D003937:Diagnosis, Differential; D005260:Female; D005350:Fibroma / Q000601:surgery*; D006801:Humans; D010255:Paranasal Sinus Neoplasms / Q000000981:diagnostic imaging / Q000601:surgery; D011859:Radiography; D013101:Sphenoid Sinus; D014054:Tomography