gms | German Medical Science

GMS Current Posters in Otorhinolaryngology - Head and Neck Surgery

German Society of Oto-Rhino-Laryngology, Head and Neck Surgery (DGHNOKHC)

ISSN 1865-1038

Contributions to the Etiology of the Pneumosinus Dilatans


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  • corresponding author Reka Ando - ENT department Tirgu Mures, Romania
  • Gheorghe Mühlfay - ENT department Tirgu Mures, Romania

GMS Curr Posters Otorhinolaryngol Head Neck Surg 2010;6:Doc94

doi: 10.3205/cpo000587, urn:nbn:de:0183-cpo0005871

Published: April 22, 2010

© 2010 Ando et al.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( You are free: to Share – to copy, distribute and transmit the work, provided the original author and source are credited.



Introduction: The forming mechanisms of the pneumosinus dilatans have been investigated for a long time, but are still not totally clear. Besides the genetic and hormonal factors, an entire explanation of the pressure variation of the sinuses is still missing. A contradiction is found in the case of subjects suffering of choanal artesia, who in some cases have quite developed sinuses. The theory claiming that the ostium acts like a high pressure valve, is not valid in all these cases, considering the lack of intra-sinusal accumulated secretions.

Method: As a result of several years of investigations, we managed to find a different explanation for the hyperpneumatizations and the patology-causing location of these. Using relatively simple means to determine pressure variations in the maxillary, frontal, and sphenoidal sinuses lead us to conclude a theory that is exact opposite of the original.

Result/conclusions: The study is trying to give the logical explication to the exaggerated bone resorption in case of dominant negative pressurized oscillations.