Pyocele of the spheno-ethmoid as a cause of persistant headache.
D000328:Adult; D002908:Chronic Disease; D005005:Ethmoid Sinus; D006261:Headache / Q000209:etiology*; D006801:Humans; D008297:Male; D009078:Mucocele / Q000150:complications*; D013101:Sphenoid Sinus