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Predictive testing of 25 percent at-risk individuals for Huntington disease (1987-1997).
- Source :
-
American journal of medical genetics [Am J Med Genet] 1999 Dec 15; Vol. 88 (6), pp. 662-8. - Publication Year :
- 1999
-
Abstract
- Before the mutation causing Huntington disease was identified, predictive testing of 25% at-risk persons with a 50% at-risk parent who did not wish to know his/her genetic status, was only possible by exclusion testing. The exclusion test, using linked markers, ensures the parent's wish not to know because the parent's risk is not changed. When mutation analysis became available in 1993, new testing options for 25% at-risk persons emerged: viz., the exclusion-definitive test and direct mutation analysis. These new tests not only disclose the risk of the test candidate, but may also change the risk of the at-risk parent and siblings. The testing options for 25% at-risk test applicants and their consequences are discussed and the testing procedures and results of testing 64 25% at-risk persons in the period 1987 to 1997 are described. Relatives received unsought information in 56% of the test procedures before and 34% after the mutation was identified. A decision tree and guidelines for predictive testing of 25% at-risk test applicants are proposed. Am. J. Med. Genet. (Neuropsychiatr. Genet.) 88:662-668, 1999.<br /> (Copyright 1999 Wiley-Liss, Inc.)
- Subjects :
- Adult
Decision Trees
Female
Genetic Counseling methods
Genetic Counseling psychology
Guilt
Heterozygote
Humans
Huntington Disease mortality
Huntington Disease psychology
Informed Consent
Male
Middle Aged
Mutation genetics
Netherlands
Nuclear Family
Pedigree
Practice Guidelines as Topic
Reproducibility of Results
Truth Disclosure
Genetic Predisposition to Disease genetics
Genetic Predisposition to Disease psychology
Genetic Testing methods
Genetic Testing psychology
Huntington Disease genetics
Subjects
Details
- Language :
- English
- ISSN :
- 0148-7299
- Volume :
- 88
- Issue :
- 6
- Database :
- MEDLINE
- Journal :
- American journal of medical genetics
- Publication Type :
- Academic Journal
- Accession number :
- 10581487
- Full Text :
- https://doi.org/10.1002/(sici)1096-8628(19991215)88:6<662::aid-ajmg16>3.0.co;2-a