Clinical spectrum of chromosome 6-linked autosomal dominant drusen and macular degeneration.
OBJECTIVE
To describe the clinical phenotype and the intrafamilial variation in retinal findings in a North American family with an autosomal dominant drusen disorder that maps to chromosome 6q14.


METHODS
Ophthalmic examinations were carried out on participating family members. Fundus photographs were obtained whenever possible. Electroretinography was performed on the proband and her father. Blood was drawn for DNA analysis.


RESULTS
Twelve family members had drusen and/or atrophic macular degeneration. The disease in asymptomatic young adults is characterized by fine drusen that are most conspicuous in the macula. The proband presented at 3 years of age with atrophic maculopathy and drusen. Her cousin was found to have atrophic macular lesions and drusen in the first year of life. Two older affected individuals have reduced vision from cicatricial and atrophic macular changes. The gene for the disease was mapped to chromosome 6q14 and appears to be adjacent to but distinct from the locus for North Carolina macular dystrophy.


CONCLUSIONS
There is extreme variability in the clinical expression of this dominant form of drusen and macular degeneration. Most young adults have fine macular drusen and good vision. Affected infants and children may have congenital atrophic maculopathy and drusen. There is historical evidence of progression of the disease in late adulthood with moderate visual loss.
Stefko
S T
ST
The Wilmer Ophthalmological Institute, Johns Hopkins Hospital, Baltimore, Maryland, USA.
Zhang
K
K
Gorin
M B
MB
Traboulsi
E I
EI
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001284:Atrophy; D002648:Child; D002675:Child, Preschool; D002896:Chromosomes, Human, Pair 6 / Q000235:genetics*; D004247:DNA / Q000032:analysis; D005260:Female; D005654:Fundus Oculi; D008040:Genetic Linkage; D006801:Humans; D007223:Infant; D008266:Macula Lutea / Q000473:pathology; D008268:Macular Degeneration / Q000235:genetics* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D010375:Pedigree; D015593:Retinal Drusen / Q000235:genetics* / Q000473:pathology; D014792:Visual Acuity
D004247:DNA