1. A New Pathogenic Variant in POU3F4 Causing Deafness Due to an Incomplete Partition of the Cochlea Paved the Way for Innovative Surgery.
- Author
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Tekin, Ahmet M., Matulic, Marco, Wuyts, Wim, Assadi, Masoud Zoka, Mertens, Griet, Rompaey, Vincent van, Li, Yongxin, Heyning, Paul van de, Topsakal, Vedat, Ophoff, Roel, and Schrauwen, Isabelle
- Subjects
COCHLEA ,COCHLEAR implants ,SENSORINEURAL hearing loss ,EAR canal ,INNER ear ,GENETIC mutation - Abstract
Incomplete partition type III (IP-III) is a relatively rare inner ear malformation that has been associated with a POU3F4 gene mutation. The IP-III anomaly is mainly characterized by incomplete separation of the modiolus of the cochlea from the internal auditory canal. We describe a 71-year-old woman with profound sensorineural hearing loss diagnosed with an IP-III of the cochlea that underwent cochlear implantation. Via targeted sequencing with a non-syndromic gene panel, we identified a heterozygous c.934G > C p. (Ala31Pro) pathogenic variant in the POU3F4 gene that has not been reported previously. IP-III of the cochlea is challenging for cochlear implant surgery for two main reasons: liquor cerebrospinalis gusher and electrode misplacement. Surgically, it may be better to opt for a shorter array because it is less likely for misplacement with the electrode in a false route. Secondly, the surgeon has to consider the insertion angles of cochlear access very strictly to avoid misplacement along the inner ear canal. Genetic results in well describes genotype-phenotype correlations are a strong clinical tool and as in this case guided surgical planning and robotic execution. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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