title: Ossifying fibroma of the sphenoid sinus.
mesh_terms: D000469:Alkaline Phosphatase / Q000097:blood; D002471:Cell Transformation, Neoplastic; D005350:Fibroma / Q000175:diagnosis / Q000473:pathology / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009999:Ossification, Heterotopic; D010255:Paranasal Sinus Neoplasms / Q000175:diagnosis / Q000473:pathology / Q000503:physiopathology*; D013101:Sphenoid Sinus
chemical_list: D000469:Alkaline Phosphatase