Fibrosarcoma of the ethmoid.
D001932:Brain Neoplasms; D002648:Child; D005005:Ethmoid Sinus; D005354:Fibrosarcoma / Q000473:pathology / Q000532:radiotherapy / Q000601:surgery; D006801:Humans; D008297:Male; D009362:Neoplasm Metastasis; D010255:Paranasal Sinus Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology / Q000532:radiotherapy / Q000601:surgery; D011859:Radiography