Archives of Disease in Childhood 2009;
94:323-324; doi:10.1136/adc.2008.154443
Copyright © 2009 BMJ Publishing Group Ltd & Royal College of Paediatrics and Child Health.
ARCHIMEDES
QUESTION 2
Veronica B Kelly,
A Salt
Mary Sheridan Centre for Child Health, 5 Dugard Way off Renfrew Road, Kennington, London SE11 4TH, UK; vbkelly@gmail.com
Great Ormond Street Hospital NHS Trust/UCL Institute of Child Health, London, UK
| The first 150 words of the full text of this article appear below. |
SHOULD FRAGILE X BE TESTED FOR IN BOYS WITH A DIAGNOSIS OF AUTISTIC SPECTRUM DISORDER?
You diagnose a 5-year-old boy with autistic spectrum disorder. His examination is unremarkable and there is no family history of learning difficulties. Should you perform a molecular genetic screen for fragile X?
Clinical bottom line
- Fragile X syndrome is significantly more common in children with autism (2%) than in the general male population (0.05%). (Grade C)
- Approximately 50 children with autism would have to be tested to diagnose one child with fragile X syndrome. (Grade C)
- Earlier identification of fragile X syndrome enables earlier genetic counselling and more accurate prognostic information to be offered. (Grade D)
STRUCTURED CLINICAL QUESTION
In boys with a diagnosis of autism [population] and no family history of learning disability [negative test result] what is the risk of fragile X syndrome [outcome]?
SEARCH STRATEGY AND OUTCOME
Searches were carried out using "Autism", "Autistic spectrum disorder" combined with "FRAX" and "fragile X".
Primary sources
PubMed: the search was limited to 1991–2008, as molecular genetic testing was routinely used to . . . [Full text of this article]

CiteULike
Complore
Connotea
Del.icio.us
Digg
Reddit
Technorati What's this?