Materiały źródłowe

• #1 Edwards Syndrome – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK570597/

  Edwards syndrome was first reported by Edwards et al in 1960 in a neonate with multiple congenital malformations and cognitive deficits. […] Trisomy 18 is an autosomal chromosomal aneuploidy caused by an extra chromosome 18, leading to various congenital malformations, and is the second most common autosomal trisomy after trisomy 21. […] This activity reviews the clinical presentation, evaluation, and management of Edwards syndrome, highlighting key information useful for the interprofessional team in identifying, assessing, and approaching patients with this condition and their families. […] Edwards syndrome, also called trisomy 18, is an autosomal chromosomal disorder caused by an extra copy of chromosome 18. […] The evaluation and diagnosis of trisomy 18 begin in the antenatal period. Maternal serum screening can show low levels of alpha-fetoprotein, human chorionic gonadotropin, and unconjugated estriol.

• #2 Trisomy 18: MedlinePlus GeneticsLock

  https://medlineplus.gov/genetics/condition/trisomy-18/

  Trisomy 18, also called Edwards syndrome, is a chromosomal condition associated with abnormalities in many parts of the body. […] Individuals with trisomy 18 often have slow growth before birth (intrauterine growth retardation) and a low birth weight. […] Affected individuals may have heart defects and abnormalities of other organs that develop before birth. […] Due to the presence of several life-threatening medical problems, many individuals with trisomy 18 die before birth or within their first month. […] Five to 10 percent of children with this condition live past their first year, and these children often have severe intellectual disability. […] Trisomy 18 occurs in about 1 in 5,000 live-born infants; it is more common in pregnancy, but many affected fetuses do not survive to term.

• #3 Trisomy 18 (Edwards Syndrome): Symptoms, Life Expectancy & Treatment

  https://www.medicinenet.com/trisomy_18_edwards_syndrome/article.htm

  Trisomy 18 or Edwards syndrome is a genetic disorder that causes a raft of life-threatening birth defects. […] Most cases of trisomy 18 are diagnosed prenatally. Standard pregnancy screening during the first and second trimesters including serum markers (plasma protein, beta-hCG, alpha-fetoprotein, unconjugated estriol, and inhibin A) with ultrasound (nuchal translucency and other anatomic abnormalities) can accurately diagnose more than three quarters of all cases. Chorionic villi sampling (CVS) is another genetic-based test that can diagnose trisomy 18. This diagnosis of trisomy 18 is important in order to better prepare parents and caregivers due to the high risk of fetal demise and early postnatal death. […] The treatment and management of children with Edwards syndrome is dependent upon the severity of findings. There is no definitive treatment for children with trisomy 18, and there are ethical issues surrounding the management of these newborns due to the high mortality rate and difficulty in predicting which infants will live beyond their first year of life. […] The average lifespan for infants born with trisomy 18 is 3 days to 2 weeks. Studies show that 60% to 75% of children survive for 24 hours, 20% to 60% for 1 week, 22% to 44% for 1 month, 9% to 18% for 6 months, and 5% to 10% for over 1 year.

• #4 The trisomy 18 syndrome

  https://pmc.ncbi.nlm.nih.gov/articles/PMC3520824/

  The trisomy 18 syndrome, also known as Edwards syndrome, is a common chromosomal disorder due to the presence of an extra chromosome 18, either full, mosaic trisomy, or partial trisomy 18q. […] Currently most cases of trisomy 18 are prenatally diagnosed, based on screening by maternal age, maternal serum marker screening, or detection of sonographic abnormalities (e.g., increased nuchal translucency thickness, growth retardation, choroid plexus cyst, overlapping of fingers, and congenital heart defects). […] The demonstration of an extra chromosome 18, or less commonly a partial trisomy of the long arm of chromosome 18, on the standard G-banded karyotype allows for confirmation of the clinical diagnosis. […] Currently in North America and Europe most cases of trisomy 18 are prenatally diagnosed, based on screening by maternal age, maternal serum marker screening, or detection of sonographic abnormalities during the second and third trimester.

• #5 The trisomy 18 syndrome | Orphanet Journal of Rare Diseases | Full Text

  https://ojrd.biomedcentral.com/articles/10.1186/1750-1172-7-81

  The trisomy 18 syndrome, also known as Edwards syndrome, is a common chromosomal disorder due to the presence of an extra chromosome 18, either full, mosaic trisomy, or partial trisomy 18q. […] Currently most cases of trisomy 18 are prenatally diagnosed, based on screening by maternal age, maternal serum marker screening, or detection of sonographic abnormalities (e.g., increased nuchal translucency thickness, growth retardation, choroid plexus cyst, overlapping of fingers, and congenital heart defects). […] The demonstration of an extra chromosome 18, or less commonly a partial trisomy of the long arm of chromosome 18, on the standard G-banded karyotype allows for confirmation of the clinical diagnosis. […] Currently in the North America and Europe most cases of trisomy 18 are prenatally diagnosed, based on screening by maternal age, maternal serum marker screening, or detection of sonographic abnormalities during the second and third trimester.

• #6 Trisomy 18 | Causes, Types, Diagnosis & Treatment

  https://www.cincinnatichildrens.org/health/t/trisomy-18

  Trisomy 18 happens in about one in 3,300 pregnancies in the United States. […] Most babies with trisomy 18 will have abnormal ultrasound findings during pregnancy. These findings might be seen in the first trimester, but they are more commonly seen during a second trimester ultrasound. […] There are also genetic tests for trisomy 18 during pregnancy. Some tests, called screening tests, can be done using a sample of the mothers blood to determine if there is a high risk for trisomy 18 in the baby. These screening tests cannot diagnose or rule out trisomy 18 for sure. The way to get a more definite answer about trisomy 18 is with diagnostic genetic testing. Diagnostic genetic testing for trisomy 18 can be done by testing the placenta (called a chorionic villi sample or CVS) during the first trimester of pregnancy or the amniotic fluid (called an amniocentesis) during the second or third trimesters.

• #7 Screening for Down’s syndrome, Edwards’ syndrome and Patau’s syndrome – NHS

  https://www.nhs.uk/pregnancy/your-pregnancy-care/screening-for-downs-edwards-pataus-syndrome/

  You will be offered a screening test for Down’s syndrome, Edwards’ syndrome and Patau’s syndrome between 10 and 14 weeks of pregnancy. This is to assess your chances of having a baby with one of these conditions. […] If a screening test shows that you have a higher chance of having a baby with Down’s syndrome, Edwards’ syndrome or Patau’s syndrome, you’ll be offered further tests to find out for certain if your baby has the condition. […] Sadly, most babies with Edwards’ syndrome or Patau’s syndrome will die before or shortly after birth. Some babies may survive to adulthood, but this is rare. […] For Edwards’ syndrome and Patau’s syndrome, if you are too far into your pregnancy to have the combined test, you’ll be offered a 20-week screening scan. This looks for physical conditions, including Edwards’ syndrome and Patau’s syndrome.

• #8 The trisomy 18 syndrome

  https://pmc.ncbi.nlm.nih.gov/articles/PMC3520824/

  The prenatal diagnosis of trisomy 18 leads to the decision of pregnancy termination in 86% of cases. […] First trimester non invasive screening based on maternal age, serum markers and sonographic soft markers demonstrated high sensitivity for diagnosis of trisomy 18. […] The most common soft sonographic markers detected in the late first/early second trimester are the increased nuchal translucency thickness and the absence or hypoplasia of the nasal bone. […] The detection rate of combined late first trimester screening (nuchal translucency, pregnancy-associated plasma protein and free beta-hCG) and second trimester quadruple screening (serum alpha-fetoprotein, total hCG, unconjugated estriol and inhibin A) is at least 78% sensitive. […] The clinical pattern of trisomy 18 is characterized by prenatal growth deficiency, specific craniofacial features and other minor anomalies, major malformations, and marked psychomotor and cognitive developmental delay.

• #9 Edwards’ syndrome (trisomy 18)

  https://www.nhs.uk/conditions/edwards-syndrome/

  Edwards’ syndrome is usually screened for in pregnancy. It’s also possible to test for it after your baby is born. […] If you’re pregnant, you’ll be offered a screening test to find out your chance of having a baby with Edwards syndrome. […] At 10 to 14 weeks of pregnancy, you’ll be invited to a combined test. This is a combined blood test and ultrasound scan, sometimes called the 12-week scan. […] If screening finds something, you’ll be referred to a specialist and may be offered more scans and tests, such as non-invasive prenatal testing (NIPT), amniocentesis or chorionic villus sampling (CVS). […] The amniocentesis and CVS tests will be able to tell you if your baby definitely has Edwards syndrome, and what this might mean for you and your baby. […] After your baby is born, you may be offered further tests to help you understand the type of Edwards syndrome they have.

• #10 Edwards Syndrome – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK570597/

  Edwards syndrome was first reported by Edwards et al in 1960 in a neonate with multiple congenital malformations and cognitive deficits. […] Trisomy 18 is an autosomal chromosomal aneuploidy caused by an extra chromosome 18, leading to various congenital malformations, and is the second most common autosomal trisomy after trisomy 21. […] This activity reviews the clinical presentation, evaluation, and management of Edwards syndrome, highlighting key information useful for the interprofessional team in identifying, assessing, and approaching patients with this condition and their families. […] Edwards syndrome, also called trisomy 18, is an autosomal chromosomal disorder caused by an extra copy of chromosome 18. […] The evaluation and diagnosis of trisomy 18 begin in the antenatal period. Maternal serum screening can show low levels of alpha-fetoprotein, human chorionic gonadotropin, and unconjugated estriol.

• #11 Trisomy 18 – Wikipedia

  https://en.wikipedia.org/wiki/Trisomy_18

  Trisomy 18, also known as Edwards syndrome, is a genetic disorder caused by the presence of a third copy of all or part of chromosome 18. […] An ultrasound during pregnancy can increase suspicion for the condition, which can be confirmed by amniocentesis. […] Ultrasound can increase suspicion of the condition, which can be confirmed by CVS or amniocentesis. […] Levels of PAPP-A, AFP, and uE3 are generally decreased during pregnancy, and free beta HCG is elevated.

• #12 Trisomy 18 Workup: Approach Considerations, Laboratory Studies, Imaging Studies

  https://emedicine.medscape.com/article/943463-workup

  First-trimester, noninvasive screening based on maternal age, serum markers, and sonographic soft markers has demonstrated a high sensitivity for the diagnosis of trisomy 18, and it is now being applied routinely. […] Low levels of human chorionic gonadotrophin (hCG) and low unconjugated estriol (uE3) in maternal serum during mid trimester are useful predictors for an increased risk for trisomy 18. […] A first-trimester biochemical screening for trisomy 18 is possible, because a retrospective study revealed reduced levels of pregnancy-associated plasma protein A (PAPP-A) and free betahuman chorionic gonadotropin (-hCG) at 8-13 weeks’ gestation. […] Screening for trisomy 18 using a combination of maternal age, PAPP-A, and beta-hCG has a detection rate of 76.6% with a false-positive rate of 0.5%.

• #13 The trisomy 18 syndrome

  https://pmc.ncbi.nlm.nih.gov/articles/PMC3520824/

  The prenatal diagnosis of trisomy 18 leads to the decision of pregnancy termination in 86% of cases. […] First trimester non invasive screening based on maternal age, serum markers and sonographic soft markers demonstrated high sensitivity for diagnosis of trisomy 18. […] The most common soft sonographic markers detected in the late first/early second trimester are the increased nuchal translucency thickness and the absence or hypoplasia of the nasal bone. […] The detection rate of combined late first trimester screening (nuchal translucency, pregnancy-associated plasma protein and free beta-hCG) and second trimester quadruple screening (serum alpha-fetoprotein, total hCG, unconjugated estriol and inhibin A) is at least 78% sensitive. […] The clinical pattern of trisomy 18 is characterized by prenatal growth deficiency, specific craniofacial features and other minor anomalies, major malformations, and marked psychomotor and cognitive developmental delay.

• #14 Trisomy 18 Workup: Approach Considerations, Laboratory Studies, Imaging Studies

  https://emedicine.medscape.com/article/943463-workup

  First-trimester, noninvasive screening based on maternal age, serum markers, and sonographic soft markers has demonstrated a high sensitivity for the diagnosis of trisomy 18, and it is now being applied routinely. […] Low levels of human chorionic gonadotrophin (hCG) and low unconjugated estriol (uE3) in maternal serum during mid trimester are useful predictors for an increased risk for trisomy 18. […] A first-trimester biochemical screening for trisomy 18 is possible, because a retrospective study revealed reduced levels of pregnancy-associated plasma protein A (PAPP-A) and free betahuman chorionic gonadotropin (-hCG) at 8-13 weeks’ gestation. […] Screening for trisomy 18 using a combination of maternal age, PAPP-A, and beta-hCG has a detection rate of 76.6% with a false-positive rate of 0.5%.

• #15 Edwards’ Syndrome: Causes, Symptoms, and Treatment | Doctor

  https://patient.info/doctor/edwards-syndrome-trisomy-18-pro

  Edwards’ syndrome (trisomy 18) is a common autosomal chromosomal disorder due to the presence of an extra chromosome 18. […] Cytogenetic studies and chromosomal analysis will confirm the diagnosis. […] Amniocentesis or chorionic villus sampling is usually needed to make a definitive prenatal diagnosis. […] A systematic review evaluating the accuracy of non-invasive prenatal diagnosis using cell-free fetal DNA in maternal plasma has confirmed the high accuracy of this technique for trisomies. For Edwards’ syndrome, the sensitivity was calculated as 97.4% and specificity as 99.95%.

• #16 EDWARDS SYNDROME (TRISOMY 18)

  https://medicover-genetics.com/product/edwards-syndrome/

  Trisomy 18 is characterized by major and minor abnormalities, affecting all organs and systems. Mortality usually occurs within the first few months of life, with over 90% of affected individuals dying within the first year of life. The frequency of Trisomy 18 is estimated to be 1 in 3,000 in live-born infants. Prenatal detection of trisomy 18 can be achieved through 1st and 2nd-trimester screening, and routine ultrasounds as the presence of one or multiple findings are evident. A positive screening test should always be confirmed by a diagnostic test, like chorionic villus sampling (CVS) or amniocentesis. Combined prenatal screening for trisomy 18 is at least 78% accurate. Non-Invasive Prenatal Testing (NIPT), analyzing the fetal blood through a blood sample taken from the expecting mother from the 10th week of pregnancy, is the most sensitive-detecting method, with over 97% accuracy. Thus, NIPT can reduce the number of unnecessary invasive procedures, and give parents invaluable time to think and research their options regarding clinical management and care.

• #17

• #18 Edwards Syndrome – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK570597/

  For example, noninvasive prenatal testing using cell-free fetal DNA in maternal plasma has a role in diagnosing trisomy 18 but has a positive predictive value of only 60.7% when used alone. […] Although the diagnosis is typically clinical, karyotyping can confirm trisomy, and microarray testing provides more detailed information about mosaicism. […] The child with Edwards syndrome should be assessed for growth during each visit, and results should be plotted on specific growth charts. […] There is no definitive treatment for Edwards syndrome. […] The major causes of sudden death in Edwards syndrome are neurological instability, cardiac failure, and respiratory failure. […] The differential diagnosis of Edwards syndrome is relatively broad and includes the following conditions: Patau syndrome (trisomy 13).

• #19 Trisomy 18 – Key Findings, Prenatal Screening and Prognosis – The ObG Project

  https://www.obgproject.com/2016/07/21/trisomy-18-what-is-it/

  Trisomy 18 (47,XX,+18 or 47,XY,+18) is also referred to as Edwards syndrome. […] ACOG requires all women be offered prenatal screening (biochemical/ cfDNA) or invasive testing (amniocentesis / CVS). […] Screening tests used to detect fetal Down syndrome also include risk assessment for Trisomy 18. […] Offer confirmatory testing following a positive screening test for Trisomy 18 due to the potential for false positive results. […] Strongly consider a false positive screening test if the prenatal ultrasound is normal as most affected fetuses will have multiple anomalies. […] Note: ACMG provides healthcare professionals with open access ‘ACT Sheets’ to guide next steps following a positive NIPS report for trisomy 18.

• #20 Trisomy 18 (Edwards Syndrome): Symptoms, Causes, Diagnosis

  https://www.webmd.com/baby/what-is-trisomy-18

  Trisomy 18 Diagnosis The doctor usually will do a screening test using some of the mother’s blood. The test can’t say for sure if your baby will have trisomy 18, but it can tell if your baby is at risk for it and for other diseases that come from chromosome errors. […] To diagnose trisomy 18, your doctor will take cells from the amniotic fluid (amniocentesis) or placenta (chorionic villus sampling) and analyze their chromosomes. These tests are done after the screening test because they carry a small risk of miscarriage or early labor. […] Chorionic villus sampling (CVS) is done in the first trimester, and amniocentesis is done in the second or third trimester. […] Around 12 weeks of pregnancy or later, your doctor can do an ultrasound, which will give them a picture of what your fetus looks like. It may tell them if your baby has trisomy 18, but it’s usually confirmed by the CVS or amniocentesis. […] After birth, the doctor may suspect trisomy 18 based on your child’s face and body. A blood sample can be taken to look for the chromosome disorder.

• #21 Edwards’ syndrome (trisomy 18)

  https://www.nhs.uk/conditions/edwards-syndrome/

  Edwards’ syndrome is usually screened for in pregnancy. It’s also possible to test for it after your baby is born. […] If you’re pregnant, you’ll be offered a screening test to find out your chance of having a baby with Edwards syndrome. […] At 10 to 14 weeks of pregnancy, you’ll be invited to a combined test. This is a combined blood test and ultrasound scan, sometimes called the 12-week scan. […] If screening finds something, you’ll be referred to a specialist and may be offered more scans and tests, such as non-invasive prenatal testing (NIPT), amniocentesis or chorionic villus sampling (CVS). […] The amniocentesis and CVS tests will be able to tell you if your baby definitely has Edwards syndrome, and what this might mean for you and your baby. […] After your baby is born, you may be offered further tests to help you understand the type of Edwards syndrome they have.

• #22 Trisomy 18 – Pediatrics – Merck Manual Professional Edition

  https://www.merckmanuals.com/professional/pediatrics/chromosome-and-gene-abnormalities/trisomy-18

  Confirmation prenatally is by cytogenetic testing (karyotyping, FISH analysis, and/or chromosomal microarray analysis) of samples obtained by amniocentesis or chorionic villus sampling, or postnatally by testing peripheral blood for women who did not wish to have additional procedures during pregnancy. Trisomy 18 detected on chorionic villus sampling may warrant further investigation either by amniocentesis or postnatal testing because the trisomy may represent confined placental mosaicism, in which aneuploidy is present in the placenta but undetectable in the fetus.

• #23 Trisomy 18 Workup: Approach Considerations, Laboratory Studies, Imaging Studies

  https://emedicine.medscape.com/article/943463-workup

  Amniocentesis is routinely recommended at 14-16 weeks’ gestation when trisomy 18 is suspected. It remains the criterion standard with which all other invasive diagnostic tests are compared. […] Chorionic villus sampling (CVS) is performed at 10-13 weeks’ gestation. […] The accuracy (96-98%) is less than that of mid trimester amniocentesis because of confined placental mosaicism and maternal cell contamination. […] False positive prenatal diagnosis of trisomy 18 using fluorescence in situ hybridization (FISH) has been reported due to rare familial variants involving the failure of hybridization of -satellite DNA or hybridization to false target chromosomes. […] The American College of Obstetricians and Gynecologists (ACOG) recommends that patients categorized by screening as high risk for fetal aneuploidy be offered invasive testing such as amniocentesis or chorionic villus sampling.

• #24 Trisomy 18 and 13 | Boston Children’s Hospital

  https://www.childrenshospital.org/conditions/trisomy-18-and-13

  The chance of having another baby with trisomy 18 or 13 is no more than 1 percent, although the risk increases slightly as the mother ages. The genetic test to diagnose trisomy 18 or 13 in a baby can determine the underlying chromosomal abnormality, which is important in determining a mother’s risk in future pregnancies. […] Chromosomal abnormalities such as trisomy 18 and 13 can be diagnosed before birth by analyzing cells in the amniotic fluid (amniocentesis) or from the placenta. […] A chromosome analysis, whether performed on a blood sample, cells from the amniotic fluid, or placenta, is over 99.9 percent accurate. […] To confirm the physical findings, a small blood sample can be taken and the chromosomes can be analyzed to determine the presence of an extra 18 or 13 chromosome.

• #25 Trisomy 18: Practice Essentials, Pathophysiology, Epidemiology

  https://emedicine.medscape.com/article/943463-overview

  Trisomy 18 is characterized by severe psychomotor and growth retardation, microcephaly, microphthalmia, malformed ears, micrognathia or retrognathia, microstomia, distinctively clenched fingers, and other congenital malformations. Among liveborn children, it is the second most common autosomal trisomy after trisomy 21. […] First-trimester, noninvasive screening based on maternal age, serum markers, and sonographic soft markers has demonstrated a high sensitivity for the diagnosis of trisomy 18, and it is now being applied routinely. […] Amniocentesis is routinely recommended at 14-16 weeks gestation when trisomy 18 is suspected. It remains the criterion standard with which all other invasive diagnostic tests are compared. […] Fluorescence in situ hybridization (FISH) for rapid diagnosis (most laboratories, 24 hours) is more sensitive for mosaicism in the neonatal period (if unknown prenatally), followed by karyotyping, which is necessary even if FISH confirms the diagnosis for the rare translocation; karyotyping is also necessary if the diagnosis is made prenatally to confirm the type of trisomy 18.

• #26 Trisomy 18 – Pediatrics – Merck Manual Professional Edition

  https://www.merckmanuals.com/professional/pediatrics/chromosome-and-gene-abnormalities/trisomy-18

  Confirmation prenatally is by cytogenetic testing (karyotyping, FISH analysis, and/or chromosomal microarray analysis) of samples obtained by amniocentesis or chorionic villus sampling, or postnatally by testing peripheral blood for women who did not wish to have additional procedures during pregnancy. Trisomy 18 detected on chorionic villus sampling may warrant further investigation either by amniocentesis or postnatal testing because the trisomy may represent confined placental mosaicism, in which aneuploidy is present in the placenta but undetectable in the fetus.

• #27 Trisomy 18 Workup: Approach Considerations, Laboratory Studies, Imaging Studies

  https://emedicine.medscape.com/article/943463-workup

  Amniocentesis is routinely recommended at 14-16 weeks’ gestation when trisomy 18 is suspected. It remains the criterion standard with which all other invasive diagnostic tests are compared. […] Chorionic villus sampling (CVS) is performed at 10-13 weeks’ gestation. […] The accuracy (96-98%) is less than that of mid trimester amniocentesis because of confined placental mosaicism and maternal cell contamination. […] False positive prenatal diagnosis of trisomy 18 using fluorescence in situ hybridization (FISH) has been reported due to rare familial variants involving the failure of hybridization of -satellite DNA or hybridization to false target chromosomes. […] The American College of Obstetricians and Gynecologists (ACOG) recommends that patients categorized by screening as high risk for fetal aneuploidy be offered invasive testing such as amniocentesis or chorionic villus sampling.

• #28 Trisomy 18 Workup: Approach Considerations, Laboratory Studies, Imaging Studies

  https://emedicine.medscape.com/article/943463-workup

  Chromosome-selective sequencing of cfDNA can distinguish 98% of trisomy 18 in the first trimester (and all cases of trisomy 21) from euploid pregnancies. […] FISH for rapid diagnosis (most laboratories, 24 hours) is more sensitive for mosaicism in the neonatal period (if unknown prenatally), followed by karyotyping, which is necessary even if FISH confirms the diagnosis for the rare translocation; karyotyping is also necessary if the diagnosis is made prenatally to confirm the type of trisomy 18. […] The genetic studies are what is important for diagnosis and to help the family with difficult decisions in these fragile infants; rapid confirmation of diagnosis is crucial.

• #29 Azthena logo with the word Azthena

  https://www.news-medical.net/health/What-is-Edwards-Syndrome.aspx

  Edwards syndrome is a genetic defect that results in several abnormalities in the body of the babies born with the condition. Babies with this chromosomal condition die soon after birth. There is no cure for this condition. […] Edward’s syndrome, which is also known as Trisomy 18, is estimated to affect one in five thousand live births. The possibility of a woman giving birth to a child with Edward’s syndrome increases with the pregnant woman’s age. […] Those found to be at high risk after the combined test will be advised to undergo a diagnostic test to confirm the presence of Edward’s syndrome. This is done by checking the baby’s cells for an extra copy of chromosome 18. […] The two ways of obtaining the cell samples include chorionic villus sampling and amniocentesis. In the chorionic villus, cell samples are collected from the placenta, which is the tissue that connects the fetus to the mother. In amniocentesis, a sample of the amniotic fluid in the womb around the baby is collected. This fluid contains the cells that the fetus has shed and is studied to obtain a definite diagnosis.

• #30 Trisomy 18 – Pediatrics – Merck Manual Professional Edition

  https://www.merckmanuals.com/professional/pediatrics/chromosome-and-gene-abnormalities/trisomy-18

  Confirmation prenatally is by cytogenetic testing (karyotyping, FISH analysis, and/or chromosomal microarray analysis) of samples obtained by amniocentesis or chorionic villus sampling, or postnatally by testing peripheral blood for women who did not wish to have additional procedures during pregnancy. Trisomy 18 detected on chorionic villus sampling may warrant further investigation either by amniocentesis or postnatal testing because the trisomy may represent confined placental mosaicism, in which aneuploidy is present in the placenta but undetectable in the fetus.

• #31 Trisomy 18 – Embryology

  https://embryology.med.unsw.edu.au/embryology/index.php?title=Trisomy_18

  Karyotype Trisomy 18 male […] Currently most cases of trisomy 18 are prenatally diagnosed, based on screening by maternal age, maternal serum marker screening, or detection of sonographic abnormalities (e.g., increased nuchal translucency thickness, growth retardation, choroid plexus cyst, overlapping of fingers, and congenital heart defects). […] The purpose of this study was to determine whether trisomy 18 patients are at an increased risk of tumor development and require formal tumor screening recommendations. […] To evaluate the sensitivity of prenatal ultrasound (US) for trisomy (T18) diagnosis and describe US findings in a large tertiary care institution in the USA. […] Ninety-five percent of fetuses with T18 had at least one abnormal US finding. This sensitivity of is higher than reported in most prior studies, but is not 100%, and should be considered when counseling women regarding prenatal diagnosis of T18.

• #32 The trisomy 18 syndrome

  https://pmc.ncbi.nlm.nih.gov/articles/PMC3520824/

  The trisomy 18 syndrome, also known as Edwards syndrome, is a common chromosomal disorder due to the presence of an extra chromosome 18, either full, mosaic trisomy, or partial trisomy 18q. […] Currently most cases of trisomy 18 are prenatally diagnosed, based on screening by maternal age, maternal serum marker screening, or detection of sonographic abnormalities (e.g., increased nuchal translucency thickness, growth retardation, choroid plexus cyst, overlapping of fingers, and congenital heart defects). […] The demonstration of an extra chromosome 18, or less commonly a partial trisomy of the long arm of chromosome 18, on the standard G-banded karyotype allows for confirmation of the clinical diagnosis. […] Currently in North America and Europe most cases of trisomy 18 are prenatally diagnosed, based on screening by maternal age, maternal serum marker screening, or detection of sonographic abnormalities during the second and third trimester.

• #33

  https://journals.lww.com/md-cases/fulltext/2022/10000/ultrasound_findings_in_prenatal_diagnosis_of.3.aspx

  Trisomy 18, also referred to as Edwards syndrome, is the second most common autosomal trisomy syndrome. Trisomy 18 can be identified during prenatal screening by the detection of abnormal maternal serum results and one or more structural abnormalities on ultrasound. […] Trisomy 18 can be identified prenatally by detection of abnormal levels of key proteins in the maternal serum, and detection of one or more structural abnormalities by ultrasound screening. Prenatal serological screening combined with ultrasound can effectively diagnose fetuses with trisomy 18 in the second trimester. […] Trisomy 18 can be identified during prenatal screening by the detection of abnormal maternal serum results and one or more structural abnormalities on ultrasound. […] The combination of serum screening and detailed ultrasound screening can significantly improve the efficiency of detecting fetuses with trisomy 18. If systemic ultrasonography suggests the existence of structural abnormalities, an invasive prenatal diagnosis is the best option.

• #34 Trisomy 18: Practice Essentials, Pathophysiology, Epidemiology

  https://emedicine.medscape.com/article/943463-overview

  Imaging studies include the following: Prenatal ultrasonography – Ultrasonographic abnormalities include microcephaly and Dandy-Walker malformation (posterior fossa enlargement associated with cerebellar hypoplasia). […] Fetal echocardiography – Abnormal cardiac findings are detectable using echocardiography in most patients with trisomy 18. […] Trisomy 18 is detectable during the prenatal and newborn periods.

• #35 The trisomy 18 syndrome

  https://pmc.ncbi.nlm.nih.gov/articles/PMC3520824/

  The trisomy 18 syndrome, also known as Edwards syndrome, is a common chromosomal disorder due to the presence of an extra chromosome 18, either full, mosaic trisomy, or partial trisomy 18q. […] Currently most cases of trisomy 18 are prenatally diagnosed, based on screening by maternal age, maternal serum marker screening, or detection of sonographic abnormalities (e.g., increased nuchal translucency thickness, growth retardation, choroid plexus cyst, overlapping of fingers, and congenital heart defects). […] The demonstration of an extra chromosome 18, or less commonly a partial trisomy of the long arm of chromosome 18, on the standard G-banded karyotype allows for confirmation of the clinical diagnosis. […] Currently in North America and Europe most cases of trisomy 18 are prenatally diagnosed, based on screening by maternal age, maternal serum marker screening, or detection of sonographic abnormalities during the second and third trimester.

• #36 Trisomy 18 (Edwards Syndrome) Types & Diagnosis | Cardinal Glennon

  https://www.ssmhealth.com/cardinal-glennon/fetal-care-institute/fetal-conditions-we-treat/genetic-syndromes/trisomy-18-(edwards-syndrome)

  Around 1 in every 5,000 babies is diagnosed with Trisomy 18, also known as Edwards syndrome. […] Trisomy 18 is caused when a person has three copies of chromosome #18 instead of the usual two, for a total of 47 chromosomes. […] How is Trisomy 18 Diagnosed? […] Pregnancies at increased risk for Trisomy 18 may be identified through screening tests such as non-invasive prenatal testing (NIPT) and ultrasound examinations. The Cardinal Glennon Fetal Care Institute can confirm the diagnosis prenatally with better than 99% accuracy through chorionic villus sampling (CVS) or amniocentesis. The diagnosis can be confirmed shortly after birth through blood testing. […] The diagnosis of Trisomy 18 is just the beginning of a journey that can be challenging for any family. […] The team at the Cardinal Glennon St. Louis Fetal Care Institute will help the family develop a plan of care for the pregnancy and immediate newborn period. That plan can include the presence of the newborn medicine team at delivery to assess the baby’s medical issues and assist with the transition after delivery.

• #37 Trisomy 18: MedlinePlus Medical EncyclopediaLock

  https://medlineplus.gov/ency/article/001661.htm

  Trisomy 18 occurs in 1 in 6000 live births. It is 3 times more common in girls than boys. […] An exam during pregnancy may show an unusually large uterus and extra amniotic fluid. There may be an unusually small placenta when the baby is born. A physical exam of the infant may show unusual facial features and fingerprint patterns. X-rays may show a short breast bone. […] Chromosome studies will show trisomy 18. The chromosome abnormality may be present in every cell or present in only a certain percentage of the cells (called mosaicism). Studies may also show part of the chromosome in some cells. Rarely, part of the chromosome 18 becomes attached to another chromosome. This is called translocation. […] Tests can be done during pregnancy to find out if the child has this syndrome.

• #38 Trisomy 18 – Pediatrics – Merck Manual Professional Edition

  https://www.merckmanuals.com/professional/pediatrics/chromosome-and-gene-abnormalities/trisomy-18

  Trisomy 18 is caused by an extra chromosome 18 and is usually associated with intellectual disability, small birth size, and various congenital anomalies, including severe microcephaly, heart defects, prominent occiput, low-set malformed ears, and a characteristic pinched facial appearance. Prenatal diagnosis is with cytogenetic testing; postnatal diagnosis is with peripheral blood testing. […] Diagnosis of trisomy 18 may be suspected postnatally by appearance, or prenatally on ultrasonography (eg, with abnormalities of extremities and fetal growth restriction), or by multiple marker screening or noninvasive prenatal screening (NIPS) using cell-free fetal DNA analysis on a maternal blood sample. The sensitivity and specificity of NIPS for trisomy 18 is relatively low, compared to trisomy 21. Management decisions, including termination of pregnancy, should not be made based on NIPS testing alone.

• #39 Trisomy 18: MedlinePlus Medical EncyclopediaLock

  https://medlineplus.gov/ency/article/001661.htm

  Trisomy 18 occurs in 1 in 6000 live births. It is 3 times more common in girls than boys. […] An exam during pregnancy may show an unusually large uterus and extra amniotic fluid. There may be an unusually small placenta when the baby is born. A physical exam of the infant may show unusual facial features and fingerprint patterns. X-rays may show a short breast bone. […] Chromosome studies will show trisomy 18. The chromosome abnormality may be present in every cell or present in only a certain percentage of the cells (called mosaicism). Studies may also show part of the chromosome in some cells. Rarely, part of the chromosome 18 becomes attached to another chromosome. This is called translocation. […] Tests can be done during pregnancy to find out if the child has this syndrome.

• #40 Trisomy 18 (Edwards Syndrome) Diagnosis Methods – Edwards Syndrome Association

  https://edwardssyndrome.org/trisomy-18-diagnosis-methods/

  Trisomy 18, also known as Edwards Syndrome, is a genetic condition caused by an extra chromosome 18. […] Diagnosis can be made prenatally (in utero) or after birth. […] Allows for proactive medical management. Helps healthcare providers and families plan for care. Allows parents to get emotional support and counseling. […] When you suspect a Trisomy 18 diagnosis, talk to a healthcare provider. Early consultation is key, medically and emotionally. […] Very accurate test for chromosomal anomalies including Trisomy 18. […] Definitive diagnosis but small risk of miscarriage. […] Definitive test with high accuracy but a small risk of complications. […] A blood test to confirm chromosomal makeup. Shows the presence of extra chromosome 18. […] Confirms chromosomal abnormality quickly.

• #41 What is Trisomy 18? – Edwards Syndrome Association

  https://edwardssyndrome.org/what-is-trisomy-18/

  Trisomy 18, also called Edwards Syndrome, is a genetic condition caused by having an extra copy of chromosome 18. […] Doctors can diagnose before and after a baby is born using different tests. […] Several tests can detect Trisomy 18 during pregnancy, including: […] After the baby is born, doctors can confirm Trisomy 18 with a blood test called a karyotype that examines the babys chromosomes.

• #42 Trisomy 18 (Edwards Syndrome) FISH Test Procedure | MedLabs

  https://www.medlabsgroup.com/lab-testing/trisomy-18-edwards-syndrome-fluorescent-in-situ-hybridisation/

  Trisomy 18 by FISH is used to confirm the diagnosis of Edwards syndrome in suspected individuals. […] This test is also used as a prenatal diagnostic tool, (when performed on amniotic fluid), to confirm or rule out Edwards syndrome pregnancies, especially after triple or quadruple test results suggestive of high-risk pregnancy. […] This test offers an advantage over traditional chromosomal Karyotyping as it is rapid, results are usually reported within 24 hours, allowing for enough time to consider the future of a given pregnancy.

• #43 Trisomy 18 (Edwards Syndrome) Types & Diagnosis | Cardinal Glennon

  https://www.ssmhealth.com/cardinal-glennon/fetal-care-institute/fetal-conditions-we-treat/genetic-syndromes/trisomy-18-(edwards-syndrome)

  Around 1 in every 5,000 babies is diagnosed with Trisomy 18, also known as Edwards syndrome. […] Trisomy 18 is caused when a person has three copies of chromosome #18 instead of the usual two, for a total of 47 chromosomes. […] How is Trisomy 18 Diagnosed? […] Pregnancies at increased risk for Trisomy 18 may be identified through screening tests such as non-invasive prenatal testing (NIPT) and ultrasound examinations. The Cardinal Glennon Fetal Care Institute can confirm the diagnosis prenatally with better than 99% accuracy through chorionic villus sampling (CVS) or amniocentesis. The diagnosis can be confirmed shortly after birth through blood testing. […] The diagnosis of Trisomy 18 is just the beginning of a journey that can be challenging for any family. […] The team at the Cardinal Glennon St. Louis Fetal Care Institute will help the family develop a plan of care for the pregnancy and immediate newborn period. That plan can include the presence of the newborn medicine team at delivery to assess the baby’s medical issues and assist with the transition after delivery.

• #44 Trisomy 18 and 13 | Boston Children’s Hospital

  https://www.childrenshospital.org/conditions/trisomy-18-and-13

  The chance of having another baby with trisomy 18 or 13 is no more than 1 percent, although the risk increases slightly as the mother ages. The genetic test to diagnose trisomy 18 or 13 in a baby can determine the underlying chromosomal abnormality, which is important in determining a mother’s risk in future pregnancies. […] Chromosomal abnormalities such as trisomy 18 and 13 can be diagnosed before birth by analyzing cells in the amniotic fluid (amniocentesis) or from the placenta. […] A chromosome analysis, whether performed on a blood sample, cells from the amniotic fluid, or placenta, is over 99.9 percent accurate. […] To confirm the physical findings, a small blood sample can be taken and the chromosomes can be analyzed to determine the presence of an extra 18 or 13 chromosome.

• #45 Trisomy 18 (Edwards syndrome)

  https://www.aboutkidshealth.ca/trisomy-18-edwards-syndrome

  Trisomy 18 is a rare chromosome abnormality that affects approximately one in every 6,000 to 8,000 live births. […] Babies with trisomy 18 have a unique group of characteristics and can be diagnosed by physical examination. To confirm the diagnosis, a small blood sample can be taken and the chromosomes can be analyzed to determine the presence of an extra chromosome 18. […] Chromosomal abnormalities can also be diagnosed before birth by analyzing cells in the amniotic fluid obtained by amniocentesis, or from the placenta, obtained by chorionic villus sampling (CVS) or from the fetal blood obtained by cordocentesis. […] The diagnosis of trisomy 18 can also be suggested by detailed fetal ultrasound; however, ultrasound is not 100% accurate, since not all abnormalities can be seen on ultrasound and the same abnormalities seen prenatally in trisomy 18 can also be seen in other conditions. In contrast, a chromosome analysis, whether performed on fetal/newborn blood sample, cells from the amniotic fluid or placental sample, is over 99.9% accurate.

• #46 Edwards Syndrome (Trisomy 18): Genetic Condition, Symptoms & Outlook

  https://my.clevelandclinic.org/health/diseases/22172-edwards-syndrome

  Edwards syndrome (trisomy 18) is a genetic condition that causes physical growth delays during fetal development. […] Diagnosis of Edwards syndrome (trisomy 18) begins during pregnancy, and confirmation of the diagnosis occurs either before or after your baby is born. Your healthcare provider will look for signs of Edwards syndrome (trisomy 18) during a routine ultrasound screening, including fetal activity, the amniotic fluid surrounding your fetus and the size of your placenta. If signs of a genetic condition are present, your healthcare provider may offer additional testing for confirmation. […] During pregnancy, your healthcare provider will offer different tests to determine the diagnosis of your child if they show symptoms of Edwards syndrome (trisomy 18). These tests include: Amniocentesis: Between 15 and 20 weeks of pregnancy, your healthcare provider will take a small sample of amniotic fluid to identify potential health conditions in your baby. […] After your child is born, your healthcare provider will examine your child’s heart via ultrasound to identify and treat any heart-related conditions as a result of their diagnosis.

• #47 Trisomy 18: Causes, Symptoms, Types, Diagnosis, Treatment and Prevention

  https://www.prepladder.com/neet-pg-study-material/pathology/trisomy-18-causes-symptoms-types-diagnosis-treatment-and-prevention

  Diagnosis Of Edward Syndrome […] Despite the fact that an ultrasound during pregnancy is not a reliable method for identifying trisomy 18, a doctor may be wary about it. More precise methods, such as amniocentesis or chorionic villus sampling, analyze the chromosomes of cells collected from the amniotic fluid or placenta. […] The doctor may postnatally suspect trisomy 18 based on the baby’s face and body. It is feasible to check for chromosomal abnormalities in a blood sample. The chromosomal blood test can also be used to determine the risk that the mother will have another child with trisomy 18. […] Your healthcare practitioner will offer various tests to diagnose your unborn child if they exhibit trisomy 18 (Edwards syndrome) signs during pregnancy. Among these tests are: […] Amniocentesis: To rule out any potential health issues in your unborn child, your doctor will remove a little sample of amniotic fluid between weeks 15 and 20 of your pregnancy. […] Chorionic villus sampling (CVS): Your doctor will remove a tiny sample of cells from your placenta between weeks 10 and 13 of pregnancy in order to check for any genetic disorders. […] Screenings: Your healthcare professional will analyse a sample of your blood after 10 weeks of pregnancy to determine whether your kid has trisomy 18, one of the frequent extra chromosome abnormalities. […] Your baby’s heart will be ultrasonically examined by your healthcare practitioner after birth to diagnose and treat any heart-related issues that may have arisen.

• #48 Edwards Syndrome (Trisomy 18): Genetic Condition, Symptoms & Outlook

  https://my.clevelandclinic.org/health/diseases/22172-edwards-syndrome

  Edwards syndrome (trisomy 18) is a genetic condition that causes physical growth delays during fetal development. […] Diagnosis of Edwards syndrome (trisomy 18) begins during pregnancy, and confirmation of the diagnosis occurs either before or after your baby is born. Your healthcare provider will look for signs of Edwards syndrome (trisomy 18) during a routine ultrasound screening, including fetal activity, the amniotic fluid surrounding your fetus and the size of your placenta. If signs of a genetic condition are present, your healthcare provider may offer additional testing for confirmation. […] During pregnancy, your healthcare provider will offer different tests to determine the diagnosis of your child if they show symptoms of Edwards syndrome (trisomy 18). These tests include: Amniocentesis: Between 15 and 20 weeks of pregnancy, your healthcare provider will take a small sample of amniotic fluid to identify potential health conditions in your baby. […] After your child is born, your healthcare provider will examine your child’s heart via ultrasound to identify and treat any heart-related conditions as a result of their diagnosis.

• #49 Trisomy 18: Practice Essentials, Pathophysiology, Epidemiology

  https://emedicine.medscape.com/article/943463-overview

  Imaging studies include the following: Prenatal ultrasonography – Ultrasonographic abnormalities include microcephaly and Dandy-Walker malformation (posterior fossa enlargement associated with cerebellar hypoplasia). […] Fetal echocardiography – Abnormal cardiac findings are detectable using echocardiography in most patients with trisomy 18. […] Trisomy 18 is detectable during the prenatal and newborn periods.

• #50 Edwards Syndrome – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK570597/

  For example, noninvasive prenatal testing using cell-free fetal DNA in maternal plasma has a role in diagnosing trisomy 18 but has a positive predictive value of only 60.7% when used alone. […] Although the diagnosis is typically clinical, karyotyping can confirm trisomy, and microarray testing provides more detailed information about mosaicism. […] The child with Edwards syndrome should be assessed for growth during each visit, and results should be plotted on specific growth charts. […] There is no definitive treatment for Edwards syndrome. […] The major causes of sudden death in Edwards syndrome are neurological instability, cardiac failure, and respiratory failure. […] The differential diagnosis of Edwards syndrome is relatively broad and includes the following conditions: Patau syndrome (trisomy 13).

• #51 Edwards syndrome | Radiology Reference Article | Radiopaedia.org

  https://radiopaedia.org/articles/edwards-syndrome-1?lang=us

  Edwards syndrome, also known as trisomy 18, along with Down syndrome (trisomy 21) and Patau syndrome (trisomy 13), make up the only three autosomal trisomies to be compatible with extrauterine life in non-mosaic forms, albeit in the case of Edward syndrome only for a week or so. […] The following serological markers (often termed a triple screen) are generally lower than expected for that of pregnancy: MSAFP: maternal serum alpha fetoprotein, estriol, beta human chorionic gonadotropin (bHCG). […] The syndrome carries an extremely poor prognosis with a mean infant survival of 48 days. The risk of recurrence for a future pregnancy is ~1% greater than that adjusted for maternal age. […] The syndrome was first described by John Hilton Edwards (19282007), a British medical geneticist. […] Pena-Shokeir syndrome (pseudotrisomy 18): an autosomal recessive condition that may share some overlap in its clinical features with trisomy 18.

• #52 Edwards Syndrome – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK570597/

  For example, noninvasive prenatal testing using cell-free fetal DNA in maternal plasma has a role in diagnosing trisomy 18 but has a positive predictive value of only 60.7% when used alone. […] Although the diagnosis is typically clinical, karyotyping can confirm trisomy, and microarray testing provides more detailed information about mosaicism. […] The child with Edwards syndrome should be assessed for growth during each visit, and results should be plotted on specific growth charts. […] There is no definitive treatment for Edwards syndrome. […] The major causes of sudden death in Edwards syndrome are neurological instability, cardiac failure, and respiratory failure. […] The differential diagnosis of Edwards syndrome is relatively broad and includes the following conditions: Patau syndrome (trisomy 13).

• #53 Edwards’ syndrome: Study of a case series | ECE2023 | 25th European Congress of Endocrinology | Endocrine Abstracts

  https://www.endocrine-abstracts.org/ea/0090/ea0090ep947

  Trisomy 18, or Edwards syndrome, is a chromosomal disorder, due to the presence of a supernumerary chromosome 18. […] The mean age at diagnosis was 37.40 pm; 23.98 days (9 days-2 months). Trisomy 18 was clinically suggested in two cases because of facial dysmorphia and malformative syndrome characteristic of the chromosomal anomaly, whereas two patients were hospitalized in an intensive care unit for decompensated heart failure due to congenital heart disease. […] The karyotype performed confirmed the diagnosis of trisomy 18 free and homogeneous in all five patients, and genetic counseling was performed. Genetic counselling is a specialized preventive medicine consultation, which allows the risk of recurrence to be calculated for any chromosomal anomaly, including Edwards syndrome. […] The incidence of trisomy 18 also increases with advanced maternal age. Furthermore, the complexity and severity of the clinical picture and the high rate of neonatal and infant mortality emphasize the importance of prenatal diagnosis of this disease.

• #54

  https://www.gov.uk/government/publications/trisomy-18-description-in-brief/edwards-syndrome-information-for-parents

  You are reading this information because your baby is suspected of having Edwards syndrome (also known as Trisomy 18 or T18) following your 20-week scan. […] We screen for Edwards syndrome at the 20-week scan (between 18+0 and 20+6 weeks of pregnancy). […] The specialist team may offer you extra tests, such as chorionic villus sampling (CVS) or amniocentesis, which will be able to confirm if your baby has Edwards syndrome and what this might mean. […] There is no cure for Edwards syndrome. […] If it is confirmed that your baby has Edwards syndrome, you can talk to the team caring for you during your pregnancy about your baby’s condition and your options. […] You can be referred to a genetic counsellor to discuss future pregnancies.

• #55 Edwards Syndrome (Trisomy 18) – almostadoctor

  https://almostadoctor.co.uk/encyclopedia/edwards-syndrome-trisomy-18

  Edwards syndrome is a genetic disorder caused but he presence of an additional (3rd ) copy of chromosome 18. The condition results from problems with cell division during early development of the foetus. It is one of the conditions that is screened for as part of the first trimester screening test. […] Most cases in the developed world are diagnosed in first trimester screening […] After a first trimester screening test with a high probability of Edwards Syndrome then amniocentesis or chorionic villus sampling should be offered to confirm the diagnosis. […] In addition genetic screening of the parents should be offered as some cases may be due to an unbalanced translocation which can occur in future pregnancies.

• #56 Trisomy 18 – Carrying To Term

  https://carryingtoterm.org/diagnosis-glossary/trisomy-18/

  Trisomy 18 can be assessed in the first and second trimesters via ultrasound and maternal serum screenings. A diagnosis can be made through fetal karyotype tests like amniocentesis or chorionic villus sampling (CVS). […] Parental genetic testing is recommended prior to a subsequent pregnancy.

• #57 Trisomy 18 (Edwards Syndrome) Diagnosis Methods – Edwards Syndrome Association

  https://edwardssyndrome.org/trisomy-18-diagnosis-methods/

  Trisomy 18, also known as Edwards Syndrome, is a genetic condition caused by an extra chromosome 18. […] Diagnosis can be made prenatally (in utero) or after birth. […] Allows for proactive medical management. Helps healthcare providers and families plan for care. Allows parents to get emotional support and counseling. […] When you suspect a Trisomy 18 diagnosis, talk to a healthcare provider. Early consultation is key, medically and emotionally. […] Very accurate test for chromosomal anomalies including Trisomy 18. […] Definitive diagnosis but small risk of miscarriage. […] Definitive test with high accuracy but a small risk of complications. […] A blood test to confirm chromosomal makeup. Shows the presence of extra chromosome 18. […] Confirms chromosomal abnormality quickly.

• #58 Edwards Syndrome – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK570597/

  Although trisomy 18 remains life-limiting, recent advances in medical care have significantly improved survival rates and outcomes. […] The primary causes of mortality include cardiac failure due to congenital heart defects and respiratory complications, such as obstructive apnea, pulmonary hypertension, and central apnea. […] Prompt consultation with an interprofessional healthcare team can improve the outcome of Edwards syndrome. […] Deterrence and patient education in Edwards syndrome focus on providing families with comprehensive, empathetic counseling to facilitate informed decision-making.

• #59 Edwards syndrome | EBSCO Research Starters

  https://www.ebsco.com/research-starters/health-and-medicine/edwards-syndrome

  Edwards syndrome, also known as Trisomy 18, is a severe congenital genetic condition caused by the presence of an extra chromosome 18. […] Key indicators of Edwards syndrome include a range of physical anomalies such as growth retardation, skeletal deformities, and cardiac defects, which can often be detected through prenatal ultrasounds. […] Understanding the syndrome helps in early detection and informed decision-making for families facing this diagnosis. […] The diagnosis of Edwards syndrome requires thoughtful clinical decision-making. […] When prenatal screening is not performed, infants are diagnosed after delivery as a result of common prevalent features and anomalies and clinical instability. Cytogenetic testing confirms the diagnosis. […] Currently, there are no known preventive strategies.

• #60 The trisomy 18 syndrome

  https://pmc.ncbi.nlm.nih.gov/articles/PMC3520824/

  The growth delay starts in prenatal period and continues after the birth, and most of the time is associated with feeding problems that may require enteral nutrition. […] The key ingredient in carrying out effective health supervision in the care of infants and children with trisomy 18 is a committed primary care practitioner.

• #61 The trisomy 18 syndrome | Orphanet Journal of Rare Diseases | Full Text

  https://ojrd.biomedcentral.com/articles/10.1186/1750-1172-7-81

  First trimester non invasive screening based on maternal age, serum markers and sonographic soft markers demonstrated high sensitivity for diagnosis of trisomy 18. […] The prenatal diagnosis of trisomy 18 leads to the decision of pregnancy termination in 86% of cases. […] The probability of survival to term increases with the increase of gestational age: 28% at 12 weeks, 35% at 18 weeks and 41% at 20 weeks. […] The major causes of death are sudden death due to central apnea, cardiac failure due to cardiac malformations and respiratory insufficiency due to hypoventilation, aspiration, upper airway obstruction or, likely, the combination of these and other factors. […] The senior author had pointed out in an Editorial in 2006 that there existed a dire need to have a dialogue regarding the ethical issues surrounding the management and care of infants and children with trisomy 18.

• #62 Understanding Edwards Syndrome – Upbility Publications

  https://upbility.net/blogs/news/understanding-edwards-syndrome?srsltid=AfmBOopMR7-8TCTDu1VocAEn-qVrgu16U-YOt1CUSvCp_YBOoAEPaLSg

  Confirmatory tests, such as karyotyping, provide a definitive diagnosis of Edwards Syndrome. They involve analyzing the size, shape, and quantity of chromosomes in a cell sample to detect the presence of an additional chromosome 18, a defining feature of Edwards Syndrome. […] Edwards Syndrome can be diagnosed through a combination of prenatal and postnatal testing, as well as karyotyping for confirmation.

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