Tr-ENT. 2003; 11(3): 85-88

Family history, clinical features, and molecular characterization of a patient with autosomal recessive non-syndromic hearing loss

Füsun Düzcan¹, Bernd Wollnýk, Emre Tepeli, F. Necdet Ardýç, Oya Uyguner, Hüseyin Baðcý

Autosomal recessive non-syndromic hearing loss is
the most common form of inherited childhood deafness.
Identification of the responsible gene in this type
of hearing loss presents difficulties because of marked
genetic heterogenicity and limited clinical presentation.
A two-year-old girl was referred to our clinic because
of congenital hearing loss. Family history showed that
her brother and six relatives of her parents were also
affected by unilateral or bilateral hearing loss. There
was no consanguinity between the parents, though
they were from close villages. Audiometric studies
revealed severe bilateral sensorineural hearing loss.
Molecular analysis of the index patient documented
that autosomal recessive non-syndromic hearing loss
resulted from the homozygous 35delG mutation in the
connexin 26 gene.

Keywords: Connexins/genetics; deafness/genetics; DNAmutational analysis; genetic screening; hearing loss, sensorineural/etiology; mutation; pedigree.

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Otozomal resesif iþitme kaybý olan bir olguda aile öyküsü, klinik ve moleküler incelemeler

Füsun Düzcan¹, Bernd Wollnýk, Emre Tepeli, F. Necdet Ardýç, Oya Uyguner, Hüseyin Baðcý

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Anahtar Kelimeler: Connexin/genetik; saðýrlýk/genetik; DNAmutasyon analizi; genetik tarama; iþitme kaybý, sensorinöral/etyoloji; mutasyon; pedigri.

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