Autosomal recessive spinocerebellar ataxia and peripheral neuropathy with raised alpha-fetoprotein.
We describe three patients from two families with progressive spinocerebellar ataxia, peripheral neuropathy, raised alpha-fetoprotein (AFP) and hypercholesterolaemia. Two siblings had identical clinical features, with late childhood onset of symptoms and slow progression, requiring crutches to walk at ages 37 and 38 years. Another patient developed ataxia aged 13 years and became wheel-chair bound by 20 years of age. Although they all had raised serum AFP levels, their clinical, immunological, biochemical, cytogenetic and molecular genetic studies failed to support a diagnosis of Ataxia Telangiectasia. Extensive investigation including imaging, biochemical and genetic studies excluded other known ataxias. Their clinical features most closely resemble the phenotype of a single consanguineous Japanese family with four individuals affected by spinocerebellar ataxia, peripheral neuropathy, raised AFP and hypercholesterolaemia. Homozygosity mapping has identified a locus in this Japanese family at 9q34. Haplotype analysis of our cases demonstrated possible linkage to 9q34, suggesting these may be the first Caucasian families described with this disorder.
Izatt
Louise
L
Department of Clinical Genetics, Guy's Hospital NHS Trust, St Thomas Street, London SE1 9RT, UK. louise.Izatt@gstt.sthames.nhs.uk
Németh
Andrea H
AH
Meesaq
Anjela
A
Mills
Kerry R
KR
Taylor
A Malcolm R
AM
Shaw
Christopher E
CE
D000328:Adult; D017668:Age of Onset; D001284:Atrophy / Q000473:pathology / Q000503:physiopathology; D002531:Cerebellum / Q000473:pathology / Q000503:physiopathology; D025063:Chromosome Disorders / Q000235:genetics*; D002874:Chromosome Mapping; D002899:Chromosomes, Human, Pair 9 / Q000235:genetics; D004252:DNA Mutational Analysis; D018450:Disease Progression; D005260:Female; D005808:Genes, Recessive; D006239:Haplotypes; D006801:Humans; D006937:Hypercholesterolemia / Q000150:complications / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D015835:Ocular Motility Disorders / Q000209:etiology / Q000503:physiopathology; D010375:Pedigree; D010523:Peripheral Nervous System Diseases / Q000097:blood / Q000150:complications / Q000235:genetics*; D012026:Reflex, Stretch; D012678:Sensation Disorders / Q000209:etiology / Q000503:physiopathology; D020754:Spinocerebellar Ataxias / Q000097:blood / Q000150:complications / Q000235:genetics*; D000509:alpha-Fetoproteins / Q000378:metabolism*
D000509:alpha-Fetoproteins