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Markus Wolfensberger, MD; Peter Herrmann, MD

Arch Otolaryngol Head Neck Surg. 1987;113(2):184-186.

Abstract
• Pneumocele is a pathologically expanding, air-containing paranasal sinus most common in the frontal sinus. To our knowledge, only six cases of pneumoceles of the maxillary sinus have been reported so far; to these we add a seventh. The pathogenesis of pneumoceles has not been fully understood. It has been postulated that a one-way valve between the nasal cavity and the affected sinus leads to increased antral pressure and sinus expansion after nose blowing. By monitoring antral pressure through a transoral puncture, we demonstrated a one-way valve between the nose and the maxillary antrum. To our knowledge, this is the first verification of the trap-valve hypothesis.

(Arch Otolaryngol Head Neck Surg 1987;113:184-186)

Author Affiliations
From the Department of Otolaryngology, Head and Neck Surgery, University of Zurich.

Footnotes
Accepted for publication June 23, 1986.

Reprint requests to Department of Otolaryngology, Head and Neck Surgery, University Hospital, Ramistrasse 100, CH-8091 Zurich, Switzerland (Dr Wolfensberger).

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