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Auditory neuropathy, autosomal dominant 2
Autosomal dominant auditory neuropathy-2 (AUNA2) is characterized by postlingual onset of progressive bilateral sensorineural hearing loss in the second decade, leading to profound deafness in the fifth decade. Affected individuals show abnormal auditory brainstem responses (ABR) even before the onset of symptoms. Outer hair cell (OHC) function is preserved initially, but declines with age (Lang-Roth et al., 2017). For a discussion of genetic heterogeneity of autosomal dominant auditory neuropathy, see AUNA1 (609129). [from OMIM]
Leukodystrophy, hypomyelinating, 24
Hypomyelinating leukodystrophy-24 (HLD24) is an autosomal dominant disorder characterized by global developmental delay and neurologic deterioration (Segawa et al., 2021). For a general phenotypic description and a discussion of genetic heterogeneity of HLD, see 312080. [from OMIM]
Hearing loss, autosomal dominant 84
Autosomal dominant deafness-84 (DFNA84) is characterized by slowly progressive nonsyndromic sensorineural hearing loss. Onset is usually in the postlingual period, during the first or second decades, although both congenital and later onset has been reported. There is intrafamilial variation in disease severity, audiogram shape, and progression (summary by Pater et al., 2022). [from OMIM]
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