Abstract
A case of chronic encapsulated subperiosteal abscess in the orbit as a complication of frontal and ethmoidal sinusitis was presented.
34 years old man with a history of moderate proptosis of the left side of 10 months duration was referred as frontoethmoidal mucocele by the ophthalmologist. Exophthalmometry revealed 18mm on the right and 22mm on the left side. Slight interference of the left eye mobility to the medial and upper direction, and visual defect on the superolateral area were detected, but no periorbital swelling nor chemosis were found.
Extranasal approach to the frontal and ethmoidal sinuses was made and this procedure revealed encapsulated subperiosteal abscess measured 8mm long in diameter at the border between frontal and ethmoid bone in the medial wall of the orbit. Concomitant inflammation in the frontal and ethmoidal sinuses was proved.
Postoperative course was uneventful.
