Doctor insights on:
Ultrasound To Detect Down Syndrome
Very skilled US: 1st trimester: nuchal translucency wider than normal. Non-Visualization of the nasal bone is sufficient to warrant diagnostic testing. 2nd trimester: most important are cystic hygroma or increased nuchal thickness; dilated ventricles of the brain, absent or small nasal bone, anomalous right subclavian artery. Heart defects, particularly conotruncal, short femur or humerus, duodenal atresia ...Read moreSee 1 more doctor answer
An ultraound, also known as a sonogram, is a painless and relatively inexpensive imaging test that utilizes sound waves instead of ionizing radiation. There are no side effects. Ultrasound can give us two-dimensional, and in some applications three-dimensional, images of structures and organs in virtually any part of the body. In addition to diagnostic uses, such as evaluating abnormalities in the abdomen, pelvis, and breast, ultrasounds are commonly used to guide needle and catheter placement in a variety of surgical ...Read more
Not precisely!: Ultrasound cannot diagnose a fetus with down syndrome (trisomy 21). It can pick up "soft" markers for downs. If you indeed identify soft markers, a discussion with your physician is critical to ascertain the risk of having an infant with a chromosomal abnormality. Further prenatal testing may be considered such as cvs or amniocentesis. It can be a difficult decision to make. ...Read more
Down's Screening: Full intergrated test consists of ultrasound measurement of nuchal translucency at 10 to 13 weeks combined with other test for serum markers has the detection rate of 85 to 95 percent and the lowest false positive rate for Down's syndrome screening tests ...Read moreSee 2 more doctor answers
Fetal ultrasounds in: the 1st & 2nd trimesters can show anatomical signs frequently seen in fetuses with Down Syndrome or other genetic accidents that result in 3 copies of a specific chromosome.Knowing your risk of DS, calculated by FUS findings, gestational & maternal age, 1st & 2nd trimester maternal blood screens, & a higher-resolution FUS, helps you decide if you want chromosomal testing for a definitive answer. ...Read more
Screening vs confirm: By definition a screening test is done to more individuals to select the group at higher risk for a problem that justifies a greater cost definitive test.All screening tests can be falsely negative or positive. The definitive tests for DS require chromosome analysis. This can be done in limited centers by finding fetal cells in mothers blood, or by CVS or amniocentesis. ...Read moreSee 1 more doctor answer
T1;14(p22;q32: commonly seen in extranodalMZL associated with lymphomas downs syndrome translocation involves different chromosomes so the chance of downs syndrome is that of the general public not any more ...Read more
Has any one had the blood test positive for Down syndrome but then ultrasound showed the baby fine?
Accuracy matters: The ultrasound is a screening test, and as such may over or underestimate the presence of what is being looked for. Accuracy is often dependent on the training of the tech and or who reads the study.The blood test is a definitive test, it is either positive or not.I would never rely on the ultrasound for any decision other than pushing me to order the blood test . ...Read moreSee 1 more doctor answer
Could high levels of hCG point to down syndrome? Mine were around 245, 000 at 9.2 weeks. Have had ultrasound and only one baby.
Range for normal HCG: Levels at 9-12 weeks lmp is 25, 700 – 288, 000 miu/ml, so yours is ok. At 11-14 weeks, a skilled ultrasonographer can determine if there is increased fluid under the skin at the base of the fetus' neck, a sign that other screens or diagnostic tests for ds are neeeded. A "quad" test that measures 4 pregnancy hormones screens for increased risk of certain birth defects including ds at 16-18 weeks. ...Read more
My maternity 21 test came back positive for down syndrome, but my ultrasound is normal. Will my amnio tomorrow say the same, or different results?
Screen vs definitive: When you are trying to test for something in large populations (pregnant women) it is common to screen with a less invasive test and only do the more invasive (and costly) test if the screening suggests a problem.The amnio will get babies cells for study, and the results will be definite.A positive study means ds is present a negative, it is not.. ...Read more
My doctor didn't find any Down syndrome markers in the ultrasound. Does that guarantee my baby won't have down syndrome?
No. OB's combine the: results of an integrated screening test that includes specific blood tests in both the first & 2nd trimesters + the first trimester ultrasound to determine a single Down Syndrome risk rating. Only prenatal diagnostic tests of fetal genetic material for either Karyotype to determine # of chromosomes or Chromosomal Microarray to determine mutations in smaller gene sequences are definitive. ...Read more
Down syndrome is the classic presentation clinically of the congenital malformation syndrome also known as Trisomy 21. Classic features may include simian creases, epicanthal folds, upslanting palpebral fissures, flat nasal bridge, hypertelorism, low set ears, endocardial cushion defects of the heart, atlanto-axial joint instability, blood ...Read more
- Talk to a doctor live online for free
- Ultrasound indications of down syndrome
- Signs of down syndrome in ultrasound
- Ultrasound of baby with down syndrome
- Ask a doctor a question free online
- Fetal ultrasound down syndrome
- Signs of down syndrome in pregnancy ultrasound
- Ultrasound for down syndrome during pregnancy
- 20 week ultrasound down syndrome
- Talk to a pediatrician online