Abstract
Sex-linked male deafness and dystonia (Mohr-Tranebjaerg syndrome) arises from mutation of the deafness/dystonia peptide (DDP) gene. We describe a novel guanine deletion at nucleotide 108 of the DDP gene in a family with Mohr-Tranebjaerg syndrome, which terminates this 97-amino acid protein at codon 25. Unlike previously reported kindreds, carrier females in this family also manifest dystonias, including torticollis and writer's cramp. A family history of male deafness should alert clinicians to the possibility of DDP mutation in women with focal dystonias.
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