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Ultrasound, Triple Screen Predict Trisomy 18 Risk.
RENO, NEV. -- Ultrasound markers and biochemical findings can accurately predict trisomy 18 risk in fetuses with choroid plexus cysts, eliminating the need for amniocentesis in a large percentage of cases, Dr. Lorraine Dugoff reported.
She based this assertion on the initial results of an ongoing prospective collaborative project being conducted at seven centers in the United States and Canada.
Thus far, data have been collected for 157 fetuses with choroid plexus cysts measuring 3 mm or more in diameter, Dr. Dugoff said in a poster session at the annual meeting of the Society for Maternal-Fetal Medicine. None of the 149 cases with a normal karyotype had both ultrasound and biochemical markers for trisomy 18, and all 6 of the trisomy 18 cases had at least two abnormal ultrasound markers and abnormal biochemistry.
Choroid plexus cysts occur in 0.18%-2.5% of second-trimester fetuses and are associated with aneuploidy, particularly trisomy 18.
The single case of trisomy 21 identified in the study also had a positive ultrasound marker and findings on the triple screen suggestive of an ...
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- Clinical aspects, prenatal diagnosis, and pathogenesis of trisomy 16 mosaicism....
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- Trisomy 13 survival can exceed 1 year. (Seen in 8% of Affected Infants).
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- Sonographic markers used to detect frequent trisomies.(Peer Review)
- Magazine article from: Radiologic Technology Oyler, Meghan Long, Bruce W. Cox, Linda A. September 1, 2004 700+ words
...relate to trisomy 13, 18 and 21. Trisomy 21 Trisomy 21, also known as Down syndrome...it the most prevalent of the 3 trisomies. (1,4-7) Although advanced...risk of carrying a child with trisomy 21, 80% of Down syndrome children...
- Significant increase in trisomy 21 in Berlin nine months after the Chernobyl...
- Magazine article from: British Medical Journal Sperling, Karl Pelz, Jorg Wegner, Rolf-Dieter Dorries, Andrea Gruters, Annette Mikkelsen, Margareta July 16, 1994 700+ words
...assess whether the increased prevalence of trisomy 21 in West Berlin in January 1987 might...Analysis of monthly prevalence of trisomy 21 in West Berlin from January 1980 to...organised health services, ascertainment of trisomy 21 was thought to be almost complete...
- Increased parity and risk of trisomy 21: review of 37,110 live births.
- Magazine article from: British Medical Journal Schimmel, Michael S. Eidelman, Arthur I. Zadka, Pnina Kornbluth, Eti Hammerman, Cathy March 8, 1997 700+ words
...women over the age of 35 for detecting trisomy 21 has been the world standard for nearly...tradeoff: the documented increased risk of trisomy 21 with advancing age versus the risk...reported a trend towards an increased risk of trisomy 21 with increased parity.[2] Given...
- Seeking other disorders within antenatal serum screening programmes for Down's...
- Magazine article from: Journal of Medical Screening Wald, N.J. Canick, J.A. December 22, 2002 700+ words
Case example: Trisomy 18 It is acccpted that certain requirements...risks and incurs costs. Identifying trisomy 18 as part of antenatal screening programmcs...Down's syndrome is one such example. Trisomy 18 occurs with a birth prevalence about...
- Research on trisomy genetics detailed by scientists at General Hospital.(Report)
- Magazine article from: Women's Health Weekly November 20, 2008 700+ words
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Source: HighBeam Research, Ultrasound, Triple Screen Predict Trisomy 18 Risk.