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  • Title: Cytogenetic survey for autistic fragile X carriers in a mental retardation center.
    Author: Cantú ES, Stone JW, Wing AA, Langee HR, Williams CA.
    Journal: Am J Ment Retard; 1990 Jan; 94(4):442-7. PubMed ID: 2297426.
    Abstract:
    A cytogenetic survey of 67 individuals previously identified as having mental retardation and autistic behaviors revealed 1 person (1.5%) with the fragile X chromosome (fra[X]) and 3 (4.5%) with autosome abnormalities. This low prevalence of fra(X) indicates that most persons with fra(X) in this mental retardation center did not have autistic behaviors severe enough to be identified as a secondary psychiatric diagnosis. The presence of other chromosomal abnormalities is consistent with the known causal heterogeneity of autism in mental retardation populations.
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