Chordoma of the frontal sinus.
D000328:Adult; D002817:Chordoma / Q000209:etiology / Q000473:pathology*; D005626:Frontal Sinus / Q000293:injuries; D006801:Humans; D008297:Male; D010255:Paranasal Sinus Neoplasms / Q000209:etiology / Q000473:pathology*