1988
DOI: 10.1111/j.1399-0004.1988.tb02848.x
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A genetic‐diagnostic survey in an institutionalized population of 158 mentally retarded patients. The Viaene experience

Abstract: In this report we summarize the results of a genetic‐diagnostic survey of an institutionalized population of 158 severely mentally retarded patients. The etiological study was based on a clinical genetic approach with special attention to dysmorphology and neurological findings. In 72 patients a constitutional cause of their mental impairment was found: a chromosomal abnormality in 21, a Mendelian disorder in 36 (autosomal recessive disorder: 23; autosomal dominant: 12; and X‐linked recessive: 1), a MCA/MR syn… Show more

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Cited by 17 publications
(4 citation statements)
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“…These findings are in accordance with the data of Kaveggia et al (1975), Fryns et al (1986), Dereymaeker et al (1988), but much higher than the findings in Laxova et al (1977) and Gustavson et al (1977). The wide range of prevalence rates of etiological causes in different surveys cannot be entirely explained by different methodological approaches and the diversity of scope of the surveys.…”
Section: Discussionsupporting
confidence: 92%
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“…These findings are in accordance with the data of Kaveggia et al (1975), Fryns et al (1986), Dereymaeker et al (1988), but much higher than the findings in Laxova et al (1977) and Gustavson et al (1977). The wide range of prevalence rates of etiological causes in different surveys cannot be entirely explained by different methodological approaches and the diversity of scope of the surveys.…”
Section: Discussionsupporting
confidence: 92%
“…The frequency of monogenic disorders in diagnostic-genetic surveys from Western countries (Table 5) ranges between 5% (Gustavson et al 1977) and 22.8% (Dereymaeker et al 1988). In the present study, 34.25% showed different mendelizing gene disorders, with 22.5% having an autosomal recessive mode of inheritance.…”
Section: Discussionmentioning
confidence: 99%
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“…genetic syndromes, exposure to noxious agents, congenital brain anomalies. [35][36][37][38] However, normal development in the first year of life does not imply normal development later in life. 39 …”
Section: Discussionmentioning
confidence: 99%