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Pneumosinus dilatans of the ethmoid sinus presenting with exophthalmus: a case report and review of the literature

¹ Department of Radiology, Duzce Faculty of Medicine, University of Abant Izzet Baysal, Konuralp, Duzce, Turkey; ² Department of Otorhinolaryngology, Duzce Faculty of Medicine, University of Abant Izzet Baysal, Konuralp, Duzce, Turkey

*Correspondence to: Burhan Yazici, Department of Radiology, Duzce Faculty of Medicine, University of Abant Izzet Baysal, Konuralp 81620, Duzce, Turkey; Email: dryazici{at}yahoo.com

Received 10 November 2005; revised 20 April 2006; accepted 20 April 2006

Pneumosinus dilatans (PSD) is a rare condition of unknown aetiology in which there is enlargement of the paranasal sinuses by air, where the affected sinus expands beyond the normal boundaries of bone without thinning of its bony walls. The case of a 28 year old male with PSD, who had gradually increasing exophthalmus and diplopia, is presented and characteristics of this condition are reviewed with literature data.

Keywords: pneumosinus dilatans; ethmoid sinus; exophthalmus,; MRI

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