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Degeneration in the macula region of the retina is a feature of a heterogeneous group of inherited, progressive disorders, causing blinding visual impairment. Autosomal dominant Doyne's honeycomb retinal dystrophy ( DHRD ) is characterised by the presence of drusen deposits at the level of Bruch's membrane in the macula and around the edge of the optic nerve head. We have studied 63 members of a large, nine-generation British pedigree by linkage analysis. Two-point analysis showed significant linkage to nine markers on the short arm of chromosome 2, a region overlapping that recently reported to be linked to Malattia leventinese. A maximum lod score ( Z  max ) of 7.29 (θ=0.0) was obtained at marker locus  D2S2251 . Haplotype analysis of recombination events localised the disease to a 5 cM region between marker loci  D2S2316  and  D2S378 . Striking clinical similarities between  DHRD  and the more common condition age-related macular degeneration (ARMD) suggest that the disease gene at this locus could be considered as the most likely candidate in future studies on ARMD.

The Gene Responsible for Autosomal Dominant Doyne's Honeycomb Retinal Dystrophy ( DHRD ) Maps to Chromosome 2p16