1.The Role of "Supporting Cells" in the Cochlea.
Li Dong ZHAO ; Xing Qi LI ; Jochen SCHACHT
Korean Journal of Otolaryngology - Head and Neck Surgery 2002;45(12):1120-1124
No abstract available.
Cochlea*
2.The complete and two-turn cochlear duct length among Filipinos
Raiza Michaella A. Kasilag ; Kathrina Aquino-Diaz
Philippine Journal of Otolaryngology Head and Neck Surgery 2022;37(2):16-19
Objective
This study aims to measure the complete and two-turn cochlear duct lengths in a Filipino population using archived CT scan images.
Cochlea
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3.A Case of Cholesteatoma Extended Both into the Cochlea and IAC.
Hyo Geun CHOI ; Jae Jin SONG ; Min Woo PARK ; Sun O CHANG
Korean Journal of Otolaryngology - Head and Neck Surgery 2009;52(5):468-470
Labyrinthine fistula caused by cholesteatoma can make various complications according to the site of the lesion. The lateral canal, superior canal ampulla, posterior canal and promontory of the cochlea are the common areas of fistulization. However, invasion into the cochlea or internal auditory canal (IAC) is very rare. We have experienced a case of cholesteatoma extending into the cochlea and IAC, which was successfully treated via the transotic approach. Herein we report this case with a review of literature
Cholesteatoma
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Cochlea
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Fistula
5.An anatomical study of the cochlea among Filipinos using high-resolution computed tomography scans
Adrian F. Fernando ; Brian Joseph dG. De Jesus ; Alejandro P. Opulencia ; Gil M. Maglalang, Jr. ; Antonio H. Chua
Philippine Journal of Otolaryngology Head and Neck Surgery 2011;26(1):6-9
Objective:
To describe the cochlear anatomy among Filipinos through high resolution computed tomography (HRCT) imaging.
Methods:
Design: Retrospective Study
Setting: Tertiary Private University Hospital
Patients: Cochlear images retrospectively obtained from computed tomography (CT) scans of subjects who underwent cranial, facial, paranasal sinus and temporal bone computed tomography from October 2009 to July 2010 were reconstructed and analyzed.
Results:
388 cochlear images were obtained from the scans of 194 subjects (101 males and 93 females, aged 1 to 90 years old, mean = 52 years) and reconstructed for analysis. The mean coiled cochlear height measured 4.36 mm on the right (A.D.) and 4.34 mm on the left (A.S.). Measurement from the oval window to the distal end of the basal turn (equivalent to the horizontal dimension of the cochlea or the mean length of the basal turn) was 7.55 mm A.D. and 7.60 mm A.S. The vertical and horizontal dimensions of right and left cochleas were identical in all subjects (S.D. = 0.35). The right and left cochlear turns were identical in each subject, exhibiting 2 1/2 turns in 92.3% of subjects and 2 3/4 turns in 7.7% of subjects.The cochlear dimensions were similar in all subjects, regardless of age. No cochlear ossification or malformation was noted on any CT image.
Conclusion
The 7.55 mm mean length of the cochlear basal turn among Filipinos in this study was 1.24 mm shorter than the average length of the basal turn of 8.81 mm reported elsewhere. Further studies of the cochlear dimensions in specific age groups and its correlation to audiometric status are recommended to determine other significant physiologic correlations.
Cochlea
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Magnetic Resonance Imaging
7.Congenital Inner Ear Malformation: Three Dimensional Volume Rendering Image Using MR CISS Sequence.
Jong Woon SONG ; In Sook LEE ; Hak Jin KIM ; Eui Kyung GOH ; Lee Suk KIM
Journal of the Korean Radiological Society 2003;49(4):237-243
PURPOSE: To evaluate three-dimensional volume-rendering of congenital inner-ear malfornations using the MR CISS (Constructive Interference in Steady State) sequence. MATERIALS AND METHODS: MR CISS images of 30 inner ears of 15 patients (M:F=10:5; mean age, 6.5years) in whom inner-ear malfornation was suspected were obtained using a superconducting Magnetom Vision System (Simens, Erlangen, Germany), with TR/TE/FA parameters of 12.25 ms/5.9 ms/70 degree. The images obtained were processed by means of the volume rendering technique at an advanced workstation (Voxtol 3.0.0; GE Systems, advanced workstation, volume analysis). The cochlea and three semicircular canals were morphologically evaluated. RESULTS: Volume-rendered images of 25 inner ears of 13 patients demonstrated cochlear anomalies in the form of incomplete partition (n=18), hypoplasia (n=2), and severe hypoplasia (n=5). For the superior semicircular canal, findings were normal in 15 ears, though common crus aplasia (n=6), hypoplasia (n=4), aplasia (n=3), and a short and broad shape (n=2) were also observed. The posterior semicircular canal of 13 ears was normal, but common crus aplasia (n=6), a short and broad shape (n=5), aplasia (n=4), hypoplasia (n=3) were also identified. Twelve lateral semicircular canals, were normal, but other images depicted a short and broad shape (n=7), a dilated crus (n=5), a broad shape (n=4), and aplasia (n=2). In 14 patients the anomalies were bilateral, and in seven, the same anomalies affected both ears. CONCLUSION: Three-dimensional volume rendering images of the inner ear depicted various morphological abnormalities of the cochlea and semicircular canals. At that locations, anomalies were more complicated and varied than in the cochlea. Three-dimensional volume rendering imaging using the MR CISS technique provides anatomical information regarding the membranous labyrinth, and we consider this useful in the evaluation of congenital inner ear malformations.
Cochlea
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Ear
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Ear, Inner*
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Humans
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Semicircular Canals
9.A Case of Congenital Vestibular Anomaly with Direction Changing Positional Nystagmus.
Won Kyo CHUNG ; Moon Suk KIM ; Hae Dong YANG ; Joo Hwan LEE
Korean Journal of Otolaryngology - Head and Neck Surgery 2000;43(1):90-94
Direction changing positional nystagmus (DCPN) is defined as a nystagmus that changes its direction with different head and body positions. In the past, it was usually thought that DCPN was the sign of central vestibular system lesion. But recently, there have been some reports that DCPN definitely does not localize the site of lesion in the central vestibular pathway, and that it more often indicates a peripheral vestibular site. However, congenital vestibular dys- or hypoplasia was not reported as a cause of DCPN. Recently, we experienced a 17-year-old patient who had a vestibular dys- or hypoplasia and showed a transient geotrophic DCPN with a normal cochlea. We report that congenital vestibular dys- or hypoplasia can be one of the causes of DCPN and present its possible mechanism.
Adolescent
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Cochlea
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Head
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Humans
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Nystagmus, Physiologic*
10.Cochlear Fistula: Report of 2 Cases.
Ha Won JUNG ; Chae Seo RHEE ; Jun Ho LEE ; Tae Young KWON
Korean Journal of Otolaryngology - Head and Neck Surgery 1997;40(9):1344-1347
Labyrinthine fistula is not infrequent findings in cholesteatoma surgery. Fistula most commonly involve the horizontal semicircular canal, but a fistula into the cochlea is rare. The authors describe two cases of cochlear fistulas in chronic otitis media with cholesteatoma.
Cholesteatoma
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Cochlea
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Fistula*
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Otitis Media
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Semicircular Canals