Unusual features in the inheritance of ataxia telangiectasia

Hum Genet. 1990 May;84(6):555-62. doi: 10.1007/BF00210809.


A prevalence study of ataxia telangiectasia was conducted in the West Midlands, with a population of over 5 million. The prevalence in those aged 50 or less was found to be 1 in 514,000 and the birth frequency to be about 1 in 300,000. A genetic study of 47 families ascertained throughout the United Kingdom was carried out concurrently. A low parental consanguinity rate was found, no parents being first cousins or more closely related, whereas 10% had been expected. The incidence of ataxia telangiectasia in the 79 sibs of index cases was 1 in 7. These two features demonstrate that ataxia telangiectasia may not always be an autosomal recessive condition. Other possible explanations are that some cases are double heterozygotes or new dominant mutations.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Ataxia Telangiectasia / epidemiology
  • Ataxia Telangiectasia / genetics*
  • Cells, Cultured
  • Child
  • Child, Preschool
  • Chromosome Aberrations
  • Chromosomes, Human / radiation effects
  • Cross-Sectional Studies
  • Female
  • Humans
  • Infant
  • Male
  • Middle Aged
  • United Kingdom / epidemiology