Pulsatile nystagmus secondary to semicircular canal dehiscence

We report the case of a 69-year-old man with a history of mastoidectomy for cholesteatoma, who developed spontaneous spinning vertigo on debridement of his cavity. Subsequent CT confirmed a lateral semicircular canal fistula, which was surgically closed with mastoid cavity obliteration. Following surgery, he developed a spontaneous, pulse-synchronous horizontal pendular nystagmus. We discuss the pathophysiology of this rare clinical sign.

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Cochlear fistula found in a naturally healed tympanic cavity

The Journal of Laryngology & Otology ◽

10.1017/s0022215100116950 ◽

1991 ◽

Vol 105 (8) ◽

pp. 656-658 ◽

Cited By ~ 2

Author(s):

Mamoru Suzuki ◽

Isao Nishida ◽

Katsuhiro Hirakawa ◽

Masafumi Nikaido ◽

Yasuo Harada

Keyword(s):

Semicircular Canal ◽

Posterior Wall ◽

Japanese Woman ◽

Mastoid Cavity ◽

Tympanic Cavity ◽

Ear Canal ◽

Horizontal Semicircular Canal ◽

Old Japanese ◽

History Of ◽

Exploratory Surgery

AbstractA cochlear fistula found in a naturally healed mastoid cavity is reported. The patient is a 53-year-old Japanese woman who was complaining of unsteadiness. She hada long history of otorrhoea in childhood. Her tympanic and mastoid cavities were widely open and were covered by thin epithelium. The posterior wall of the ear canal was missing. She had no hearing in the ear but responded to electrical promontory testing. Exploratory surgery was indicated at which fistulae of the basal turn of the cochlea and the horizontal semicircular canal were found. These fistulae were sealed by pieces of bone andmuscle.

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Superior semicircular canal dehiscence with a large tegmental defect

The Journal of Laryngology & Otology ◽

10.1017/s0022215106004178 ◽

2006 ◽

Vol 121 (2) ◽

pp. 189-191 ◽

Cited By ~ 18

Author(s):

S Mahendran ◽

V S Sunkaraneni ◽

D M Baguley ◽

P R Axon

Keyword(s):

Semicircular Canal ◽

Previous History ◽

Clinical Manifestations ◽

Large Defect ◽

Superior Semicircular Canal Dehiscence ◽

Superior Semicircular Canal ◽

Tegmen Tympani ◽

History Of ◽

Canal Dehiscence

We report on the presentation and clinical manifestations of superior semicircular canal dehiscence in association with a large defect of the tegmen tympani in a 41-year-old woman with no previous history of trauma. Based on this case we recommend that clinicians consider the possibility of superior semicircular canal dehiscence in patients presenting with symptoms associated with tegmen defects.

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The incidence of tympanogenic labyrinthitis ossificans

The Journal of Laryngology & Otology ◽

10.1017/s002221511400111x ◽

2014 ◽

Vol 128 (7) ◽

pp. 618-620 ◽

Cited By ~ 7

Author(s):

H-Y Lin ◽

Y-K Fan ◽

K-C Wu ◽

M-T Shu ◽

C-C Yang ◽

...

Keyword(s):

Computed Tomography ◽

Head And Neck Cancer ◽

Cochlear Implants ◽

Semicircular Canal ◽

Lateral Semicircular Canal ◽

Posterior Semicircular Canal ◽

High Resolution Computed Tomography ◽

Labyrinthitis Ossificans ◽

Computed Tomography Scans ◽

History Of

AbstractObjective:To estimate the incidence of tympanogenic labyrinthitis ossificans.Methods:The records of patients treated with mastoidectomy for various tympanogenic aetiologies from January 2007 to December 2011 were retrospectively reviewed. Patients whose high-resolution computed tomography scans showed evidence of labyrinthine calcification of the temporal bone were enrolled. Patients with a history of head and neck cancer, meningitis, and otosclerosis, and patients with cochlear implants, were excluded from this study.Results:A total of 195 patients were enrolled in this study; 4 of the patients presented with calcification in the inner ear. Therefore, the incidence of tympanogenic labyrinthitis ossification was 2 per cent. The computed tomography findings revealed: (1) cochlear calcifications of the basal and middle turn in two patients; and (2) vestibular, superior semicircular canal, posterior semicircular canal and lateral semicircular canal calcification in one, four, three and two patients, respectively.Conclusion:The incidence of tympanogenic labyrinthitis ossification in patients who had undergone a mastoidectomy was 2 per cent.

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How I do it: underwater endoscopic ear surgery for plugging in superior canal dehiscence syndrome

The Journal of Laryngology & Otology ◽

10.1017/s0022215117001104 ◽

2017 ◽

Vol 131 (8) ◽

pp. 745-748 ◽

Cited By ~ 4

Author(s):

D Yamauchi ◽

Y Hara ◽

H Hidaka ◽

T Kawase ◽

Y Katori

Keyword(s):

Inner Ear ◽

Semicircular Canal ◽

Saline Water ◽

Mastoid Cavity ◽

Endoscopic Ear Surgery ◽

Ear Surgery ◽

Membranous Labyrinth ◽

Endoscopic View ◽

Superior Canal Dehiscence ◽

Canal Dehiscence

AbstractBackground:Underwater endoscopic ear surgery does not require suction and so protects the inner ear from unexpected aeration that may damage its function in the treatment of labyrinthine fistula. A method of underwater endoscopic ear surgery is proposed for the treatment of superior canal dehiscence.Methods:Underwater endoscopic ear surgery was performed for plugging of the superior semicircular canal through the transmastoid approach. Saline solution was infused into the mastoid cavity through an Endo-Scrub Lens Cleaning Sheath. The tip of the inserted endoscope was filled completely with saline water.Results:Using this underwater endoscopic view, the canal was clearly dissected to expose the semicircular canal membranous labyrinth and dehiscence area. No particular complication occurred during the surgical procedure.Conclusion:The underwater endoscopic ear surgery technique for plugging in superior canal dehiscence secures an excellent visual field and protects the inner ear from unexpected aeration.

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Lateral Semicircular Canal Dehiscence

Otology & Neurotology ◽

10.1097/mao0b013e31809ed965 ◽

2007 ◽

Vol 28 (8) ◽

pp. 1155-1156 ◽

Cited By ~ 1

Author(s):

Marc K. Bassim ◽

Krishna G. Patel ◽

Craig A. Buchman

Keyword(s):

Semicircular Canal ◽

Lateral Semicircular Canal ◽

Canal Dehiscence

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Clinical Characteristics of Posterior and Lateral Semicircular Canal Dehiscence

Journal of Neurological Surgery Part B Skull Base ◽

10.1055/s-0035-1551667 ◽

2015 ◽

Vol 76 (06) ◽

pp. 421-425 ◽

Cited By ~ 10

Author(s):

Marko Spasic ◽

Andy Trang ◽

Lawrance Chung ◽

Nolan Ung ◽

Kimberly Thill ◽

...

Keyword(s):

Semicircular Canal ◽

Clinical Characteristics ◽

Lateral Semicircular Canal ◽

Canal Dehiscence

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Cholesteatoma Causing a Horizontal Semicircular Canal Fistula

Ear Nose & Throat Journal ◽

10.1177/01455613211040580 ◽

2021 ◽

Vol 100 (6_suppl) ◽

pp. 888S-891S

Author(s):

Hamid Djalilian ◽

Michela Borrelli ◽

Alexis Desales

Keyword(s):

Semicircular Canal ◽

Mastoid Cavity ◽

Canal Wall ◽

Mastoid Obliteration ◽

Horizontal Semicircular Canal ◽

Horizontal Canal ◽

Chronic Dizziness ◽

Wind Exposure ◽

Canal Wall Down ◽

Cavity Obliteration

Horizontal canal fistulas are not uncommon in patients with cholesteatoma. Patients with canal wall down cavities and exposed horizontal canal fistulas develop significant dizziness with wind or suction exposure. Obliteration of mastoid cavities in patients with exposed fistulas can be challenging. We describe a patient with horizontal canal fistula and chronic dizziness from wind exposure who underwent successful mastoid cavity obliteration with preservation of hearing. Patients with horizontal canal fistulas in a canal wall down cavity can be managed with mastoid obliteration for relief of dizziness.

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