scholarly journals Association between facial nerve second genu angle and facial canal dehiscence in patients with cholesteatoma: evaluation with temporal multidetector computed tomography and surgical findings

2019 ◽  
Vol 85 (3) ◽  
pp. 365-370 ◽  
Author(s):  
Asli TanrivermiŞ Sayit ◽  
Hediye Pinar Gunbey ◽  
Dilek Sağlam ◽  
Emre Gunbey ◽  
Şemsettin KardaŞ ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Facial Nerve ◽  
Multidetector Computed Tomography ◽  
Facial Canal ◽  
Facial Canal Dehiscence ◽  
Canal Dehiscence

Is there a relationship between mastoid pneumatisation and facial canal dimensions?

2019 ◽  
Vol 133 (7) ◽  
pp. 546-553
Author(s):  
M Inal ◽  
N Bayar Muluk ◽  
N Asal ◽  
M H Şahan ◽  
G Şimşek ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Retrospective Study ◽  
Multidetector Computed Tomography ◽  
Temporal Bone ◽  
Facial Canal ◽  
Computed Tomography Scans ◽  
Facial Canal Dehiscence ◽  
Older Subjects ◽  
The Right ◽  
Canal Dehiscence

AbstractObjectiveTo evaluate mastoid pneumatisation and facial canal dimensions.MethodIn this retrospective study, 169 multidetector computed tomography scans of temporal bone were reviewed. Facial canal dimensions were evaluated at the labyrinthine, tympanic and mastoid segments using axial and coronal multidetector computed tomography scans of temporal bone. Mastoid pneumatisation and facial canal dehiscence were evaluated. Facial canal dehiscence was measured if it was found to be present.ResultsThis study showed that facial canal dimensions decreased in pneumatised mastoids. Facial canal dimensions in females were smaller than in males. Facial canal dehiscence was detected in 5.9 per cent and 6.5 per cent of the patients on the right and left sides, respectively. No correlations were found between facial canal dehiscence and mastoid pneumatisation. The length of dehiscence was 1.92 ± 0.44 mm (range, 0.86–2.51 mm) on the left side. In older subjects, left facial canal dehiscence was detected more, and the length of the dehiscence increased.ConclusionThis study concluded that during surgery, facial canal dehiscence should be kept in mind in order to avoid complications.

scholarly journals Can MDCT Scan of the Temporal Bone Looking at Pneumatization Predict Surgical Vulnerability of the Facial Nerve?

2019 ◽  
pp. 014556131987952
Author(s):  
Mikail Inal ◽  
Nuray Bayar Muluk ◽  
Mehmet Hamdi Şahan ◽  
Neşe Asal ◽  
Gökçe Şimşek ◽  
...  
Keyword(s):  
Facial Nerve ◽  
Facial Canal ◽  
Nerve Injuries ◽  
Mastoid Pneumatization ◽  
Computed Tomography Scans ◽  
Facial Nerve Injuries ◽  
Important Landmark ◽  
Facial Canal Dehiscence ◽  
Males And Females ◽  
Canal Dehiscence

Objectives: The aim of this study is to investigate the scutum–cochleariform process (CP) and scutum–promontorium distances according to the mastoid pneumatization condition. Methods: Two hundred temporal multidetector computed tomography scans (90 males and 110 females) were evaluated retrospectively. The scutum-CP and scutum–promontorium distances were measured. Facial canal dehiscence (FCD) in the tympanic segment and mastoid pneumatization were also evaluated. Results: The distances between scutum-CP and scutum–promontorium were not different between males and females and between right and left sides. Facial canal dehiscence in the tympanic segment was detected: 5.6% (right) and 7.8% (left) in males and 5.5% (right) and 10.0% (left) in females. Grade 4 (100%) pneumatization was detected mainly in 55.6% to 57.8% of the patients in both genders. Grade 0 (0%) pneumatization (sclerosis) was detected in 22.2% to 28.2% of both males and females. In more pneumatized mastoids, the scutum-CP and scutum–promontorium distances increased. In sclerotic mastoids, the scutum-CP and scutum–promontorium distances decreased. Facial canal dehiscence rates were not related to the mastoid pneumatization levels. Conclusion: Cochleariform process is an important landmark to localize the tympanic segment of the facial canal. In sclerosed mastoids, scutum-CP and scutum–promontorium distances decreased. There was no relationship between FCD rates and mastoid pneumatization levels. It may be due to the development of FCD that occurs during the intrauterine period. In endoscopic and classic ear surgeries, mastoid pneumatization must be evaluated preoperatively to avoid facial nerve injuries.

Facial canal dehiscence in patients with cholesteatoma: concordance between intraoperative inspection, computed tomography and neurophysiological findings

2019 ◽  
Vol 276 (7) ◽  
pp. 1915-1920
Author(s):  
Francisco Arias-Marzán ◽  
Gemma de Lucas-Carmona ◽  
Esteban Reinaldo Pacheco Coronel ◽  
Pedro Javier Perez Lorensu ◽  
Alejandro Jiménez-Sosa ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Facial Canal ◽  
Facial Canal Dehiscence ◽  
Canal Dehiscence

Prevalence of facial canal dehiscence and other bone defects by computed tomography

2020 ◽  
Vol 277 (10) ◽  
pp. 2681-2686
Author(s):  
Andrea Fabiola Hernandez-Trejo ◽  
Karla Paola Cuellar-Calderon ◽  
Jose Luis Treviño-Gonzalez ◽  
Masao Yamamoto-Ramos ◽  
Mario Alberto Campos-Coy ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Bone Defects ◽  
Facial Canal ◽  
Facial Canal Dehiscence ◽  
Canal Dehiscence

Percutaneous Threshold of Facial Nerve Stimulation Predicts Facial Canal Dehiscence

2019 ◽  
Vol 59 (2) ◽  
pp. 91-103
Author(s):  
Patricia Johnson ◽  
Taha Mur ◽  
Richard Vogel ◽  
Pamela C. Roehm
Keyword(s):  
Facial Nerve ◽  
Nerve Stimulation ◽  
Facial Canal ◽  
Facial Canal Dehiscence ◽  
Facial Nerve Stimulation ◽  
Canal Dehiscence

scholarly journals Diagnostic efficacy of high-resolution computed tomography findings in patients of chronic suppurative otitis media atticoantral type

2020 ◽  
Vol 6 (10) ◽  
pp. 1854
Author(s):  
Nikki Gajjar ◽  
Neena Bhalodiya ◽  
Simple Bhadania
Keyword(s):  
Soft Tissue ◽  
Temporal Bone ◽  
Facial Canal ◽  
Soft Tissue Density ◽  
High Resolution Computed Tomography ◽  
Suppurative Otitis Media ◽  
Tissue Density ◽  
Facial Canal Dehiscence ◽  
Operative Findings ◽  
Canal Dehiscence

<p><strong>Background: </strong>High resolution computed tomography (HRCT) provides information about anatomy and pathology of temporal bone and middle ear cleft, thus becoming important imaging modality in diagnosis and pre-operative planning in patients of chronic suppurative otitis media (attico-antral) CSOM (AA) type. The aim of study was to study disease extension and plan surgery accordingly in patients of CSOM (AA) and to study correlation between the HRCT findings and intra-operative findings of CSOM (AA) like soft tissue density mass, ossicular chain erosion, facial canal dehiscence, semi-circular canal erosion.</p><p><strong>Methods: </strong>Study of 70 patients clinically diagnosed of having CSOM (AA) in period between August 2018 to March 2020 was done at Sola civil hospital, Ahmedabad. All patients were advised HRCT temporal bone except those who had contraindications to CT scan, analysed and operated. Pre-operative CT-scan findings and intra-operative findings were compared for statistical analysis.</p><p><strong>Results: </strong>Soft tissue density was found in 100% of cases on HRCT temporal bone. Bony erosion seen in 25% of cases. 90% showed ossicular erosion. Lateral semi-circular canal fistula was observed in 10% of cases with facial canal dehiscence in 10% of cases. Intra-operative findings showed accuracy of HRCT in detecting soft tissue density to be 100%; bony erosion was observed in 25% cases. 10% patients had lateral semi-circular canal fistula. Facial canal dehiscence was seen in 15% cases.</p><strong>Conclusion: </strong>HRCT has proved quite useful and reliable to identify the disease extension before surgery and plan surgery accordingly.<p> </p>

Sign in / Sign up

Export Citation Format

Share Document