The prevalence of superior canal dehiscence syndrome as assessed by temporal bone computed tomography imaging

• Published in: Acta oto-laryngologica Vol. 131; no. 3; pp. 258 - 262
• Main Author: Masaki, Yoshio
• Format: Journal Article
• Language: English
• Published: Stockholm Informa Healthcare 01.03.2011; Taylor & Francis; Informa
• Subjects: Aged; Aged, 80 and over; air-bone gap; Audiometry; Biological and medical sciences; Bone imaging; Computed tomography; conductive hearing loss; Dehiscence; Ear; Ear canal; Ear Diseases - diagnostic imaging; Ear, auditive nerve, cochleovestibular tract, facial nerve: diseases, semeiology; Eye Movements; Female; fistula symptom; Humans; Male; Medical sciences; Middle Aged; Nervous system (semeiology, syndromes); Nervous system as a whole; Neurology; Non tumoral diseases; nystagmus; Oculomotor disorders; Ophthalmology; Otorhinolaryngology. Stomatology; Prevalence; Semicircular canals; Semicircular Canals - diagnostic imaging; Stress; superior semicircular canal; Syndrome; Temporal bone; Temporal Bone - diagnostic imaging; Tomography, X-Ray Computed; Tullio phenomenon; Vertigo; Prevalence; Middle ear disease; Auditory disorder; Conduction hearing loss; Fistula; ENT; Epidemiology; Vertigo; ENT disease; Oculomotor syndrome; fistula symptom; superior semicircular canal; Nervous system diseases; Temporal bone; Radiodiagnosis; air-bone gap; Air; Equilibrium disorder; Tullio phenomenon; Symptomatology; conductive hearing loss; Eye disease; Semicircular canal; Dehiscence; Gap; Nystagmus; Medical imagery; Computerized axial tomography
• ISSN: 0001-6489; 1651-2251
• DOI: 10.3109/00016489.2010.526145

Abstract Conclusion: When a diagnosis of superior canal dehiscence syndrome (SCDS) was made based solely on CT scans, 80% of cases assessed were false positive. This stresses the importance of diagnosing SCDS on the basis of both CT findings and clinical symptoms. Objectives: All the coronal computed tomography (CT) scans of the temporal bones retained in this clinic were reviewed to determine how many of these examined ears have dehiscence(s) of the superior semicircular canal (SSCC). We also determined how many of the ears with a dehiscence of SSCC could also be diagnosed clinically on CT scans as having SCDS. Methods: CT scans of 82 patients, covering 164 ears, were reviewed to determine how many of these ears had dehiscence of SSCC. Of the ears found to have a dehiscence of SSCC in the above procedure, it was determined how many ears could also be diagnosed clinically as having SCDS. Results: Dehiscence of SSCC was demonstrated in 5 (3%) of the 164 ears assessed. Of the five ears noted to have a dehiscence of SSCC, the condition was also considered clinically to be SCDS in only one ear (0.6%).