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Pneumosinus dilatans of the frontal sinuses: two cases and a discussion of its aetiology

Published online by Cambridge University Press:  08 March 2006

J. L. Walker  and
N. S. Jones
J. L. Walker
Affiliation:
Department of Otorhinolaryngology, Head and Neck Surgery, Queens Medical Centre, University Hospital, Nottingham, U.K.
N. S. Jones
Affiliation:
Department of Otorhinolaryngology, Head and Neck Surgery, Queens Medical Centre, University Hospital, Nottingham, U.K.
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Abstract

Pneumosinus dilatans is a rare condition with the dilatation of aerated paranasal sinuses. We present two cases and discuss its aetiology, the radiological classification of enlarged aerated sinuses, and its treatment. One much quoted hypothesis for the cause of this condition has been that it is due to a ‘ball valve’ effect of mucosal closure at the frontal recess. However, one of our subjects has started, and done, a considerable amount of subaqua diving since presenting with their condition and has had no symptoms on diving, or progression of their frontal swelling. This observation, along with the fact that retained secretions are not seen within the sinuses in this condition, raises doubt about the theory that a one-way valve is responsible.

Keywords

Paranasal SinusesPneumosinus DilatansRadiologyAetiology
Type
Research Article
Information
The Journal of Laryngology & Otology , Volume 116 , Issue 5 , May 2002 , pp. 382 - 385
Copyright
© Royal Society of Medicine Press Limited 2002

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