Semicircular canal dehiscence in HR multislice computed tomography: distribution, frequency, and clinical relevance
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : H. Stimmer · K. F. Hamann · S. Zeiter · A. Naumann · E. J. Rummeny
- چاپ و سال / کشور: 2011
Description
The literature about bony defects in the semicircular canal system is highly inconsistent. Therefore, we analyzed a series of 700 high-resolution multislice CT examinations of the temporal bone for semicircular canal dehiscencies. An unselected group of ENT patients with diVerent clinical symptoms and variable age was chosen. We found semicircular canal dehiscence in 9.6% of temporal bones, superior semicircular canal was aVected mostly (8%), less common posterior semicircular canal (1.2%); only in 3 cases (0.4%), lateral semicircular canal showed dehiscence. In 60% of SSC dehiscence, we registered bilateral manifestation. The so-called “third mobile window” in semicircular canal dehiscence causes a great variety of clinical symptoms like vertigo, nystagmus, oscillopsies, hearing loss, tinnitus and autophonia. Comparison with anatomic studies shows that CT examination implies the risk of considerable overestimation; this fact emphasizes the important role of clinical and neurophysiological testing.
Eur Arch Otorhinolaryngol DOI 10.1007/s00405-011-1688-6, Received: 8 April 2011 / Accepted: 21 June 2011
