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Title: X-linked progressive mixed deafness: a new microdeletion that involves a more proximal region in Xq21. Author: Piussan C, Hanauer A, Dahl N, Mathieu M, Kolski C, Biancalana V, Heyberger S, Strunski V. Journal: Am J Hum Genet; 1995 Jan; 56(1):224-30. PubMed ID: 7825582. 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.[Abstract] [Full Text] [Related] [New Search]