X-linked progressive mixed deafness: a new microdeletion that involves a more proximal region in Xq21. |
| |
Authors: | C Piussan A Hanauer N Dahl M Mathieu C Kolski V Biancalana S Heyberger V Strunski |
| |
Affiliation: | Unité de Génétique Clinique, CHU d''Amiens, France. |
| |
Abstract: | We report a large two-generation pedigree with seven affected males segregating for an X-linked mixed conductive sensorineural deafness. The patients present with atypical Mondini-like dysplasia, dilated petrous facial canal, dilatation of the internal auditory meatus fully connected with enlarged cochlear canals, and, in one patient, a wide bulbous posterior labyrinth. Obligatory carrier females are mildly affected. Molecular characterization of this family revealed a deletion of locus DXS169, in Xq21.1. Loci DXS72 and DXS26, which, respectively, flank DXS169 proximally and distally, were intact. Since a gene responsible for X-linked progressive mixed deafness with perilymphatic gusher (DFN3) has previously been assigned by deletion mapping to a slightly more distal interval between DXS26 and DXS121, this study indicates either two different deafness genes or the involvement of a very large region in Xq21. |
| |
Keywords: | |
|
|