Prenatal presentation and diagnostic evaluation of suspected Smith-Lemli-Opitz (RSH) syndrome
Smith-Lemli-Opitz (SLOS), or RSH syndrome, is an autosomal recessive deficiency of 7-dehydrocholesterol reductase (DHCR7) resulting in an accumulation of 7- and 8-dehydrocholesterol (7- and 8-DHC) in tissues and body fluids. At birth patients have variable malformations of CNS, heart, kidney, genita...
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| Main Authors: | , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
26 March 2013
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| In: |
American journal of medical genetics
Year: 2013, Volume: 161, Issue: 5, Pages: 1008-1011 |
| ISSN: | 1552-4833 |
| DOI: | https://doi.org/10.1002/ajmg.a.35837 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/https://doi.org/10.1002/ajmg.a.35837 Verlag, lizenzpflichtig, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/ajmg.a.35837 
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| Author Notes: | Dorothea Haas, Gisela Haege, Georg F. Hoffmann, and Peter Burgard |
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| 520 | |a Smith-Lemli-Opitz (SLOS), or RSH syndrome, is an autosomal recessive deficiency of 7-dehydrocholesterol reductase (DHCR7) resulting in an accumulation of 7- and 8-dehydrocholesterol (7- and 8-DHC) in tissues and body fluids. At birth patients have variable malformations of CNS, heart, kidney, genitalia, and limbs, which may be life-limiting. In later course, psychomotor and mental retardation and behavior abnormalities become evident. Prenatally SLOS can be suspected on the basis of malformations and intrauterine growth retardation (IUGR) in prenatal ultrasonography and reduced maternal free estriol in serum. The diagnosis is confirmed by sterol analysis in a chorionic villus biopsy or amniotic fluid (AF). In this study, we evaluated the predictive value of the above mentioned criteria in combination with family history by quantification of sterols in AF in pregnancies with either a family history, ultrasonographical abnormalities typical for SLOS, or reduced maternal serum unconjugated estriol (MSuE3). The relative frequency of SLOS in fetuses with an affected sibling was 0.23, as to be expected for an autosomal recessive disease. The probability for SLOS was <0.6% when neither an affected sib nor more than one typical SLOS malformation was present. For safety reasons and for cost-effectiveness we recommend careful evaluation of history, MSuE3, and clinical presentation before determining sterols in AF. © 2013 Wiley Periodicals, Inc. | ||
| 650 | 4 | |a amniotic fluid | |
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| 650 | 4 | |a Smith-Lemli-Opitz syndrome | |
| 650 | 4 | |a sterol analysis | |
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