title: Ethmoid sinus fibrosarcoma arising as a frontal mucocele.
mesh_terms: D000328:Adult; D001706:Biopsy; D003937:Diagnosis, Differential; D005005:Ethmoid Sinus / Q000473:pathology; D005354:Fibrosarcoma / Q000175:diagnosis* / Q000473:pathology; D005626:Frontal Sinus; D006801:Humans; D008297:Male; D009078:Mucocele / Q000175:diagnosis*; D010254:Paranasal Sinus Diseases / Q000175:diagnosis*; D010255:Paranasal Sinus Neoplasms / Q000175:diagnosis* / Q000473:pathology