Noonan Syndrome Case Study

Procedures such as amniocentesis and chorionic villus sampling (CVS) represent the standard diagnostic methods used by clinicians to screen fetuses for abnormalities or genetic disease such as Down syndrome. In amniocentesis, a needle is inserted into the amniotic sac of the mother and a small sample of amniotic fluid is obtained. Fetal tissue is contained within the amniotic fluid and is subsequently analyzed genetically and cytogenetically for abnormalities. In the case of CVS, a sample of placental tissue is obtained through the mother’s cervix for downstream genetic analysis as in the case of amniocentesis (CDC,

Trisomy 13 is a very terrible disease to have. The disease causes many deformities. You would have a very deformed body. The disease happens when there is a third thirteenth chromosome. Instead of the normal two, there would be three. The symptoms are heart, brain, spinal cord, and bone abnormalities, also a hole in the iris lip and pallet. Along with those are small head, eyes, and lower jaw, then there is close-set eyes that can fuse into one and low-set ears.

Johnson Munson syndrome will start within the DNA from the formation of the fetus at birth. There are birth defects that cause the variety of disfiguring parts of the body. There for the limbs may not be of proper size and these could consist of a toe or finger missing. The toes and fingers can also be grown together, arms, and legs may not be fully developed. As of today, there is one known risk factor that has been found within the first year of the child’s

In 1996, the susceptibility locus for Cowden syndrome was mapped to chromosome 10q22-23, and in 1997, germline mutations in the PTEN gene (phosphatase and tensin homology, deleted on chromosome 10) on 10q23 were first reported in families with this syndrome. Hamartomas in Cowden syndrome affect all three germ cell layers but most commonly arise from ectodermal and endodermal elements. Almost all patients (90% to 100%) have mucocutaneous lesions that include trichilemmomas, acral keratoses, and oral papillomas. Breast lesions affect the majority of female patients and include fibroadenomas, fibrocystic disease, and adenocarcinomas (25% to 50%). Thyroid abnormalities, such as multinodular goiter and follicular adenoma, are found in one half to two thirds of patients. Thyroid carcinoma occurs in 3% to 10% of patients. Macrocephaly, cerebellar gangliocytoma, and genitourinary malformations are also frequent components of Cowden syndrome. Increased risks for endometrial carcinoma and renal cell carcinoma have been added to the operational criteria for Cowden

Your health care provider may suspect trisomy 13 or 18 if multiple defects are found at birth. The diagnosis can be confirmed by genetic testing done on a blood sample. Your health care provider may have imaging studies done to check for major abnormalities in the heart, digestive system, or brain. These may be done using:

Witkop syndrome is manifested by defects in the nail plates of fingers and toes typically and hypodontia, with normal hair and sweat gland function. There is a pattern of missing teeth.8 Absent maxillary incisors, second molars, and maxillary canines are the most common missing teeth.9 Genetically, mutations in genes MSX-1, PAX9, PsITX2, LTBP3, WNT10A, EDA and EDARADD, AXIN2, and IKBKG have been found associated with oligodontia. Mutations in MSX-1 have been shown to be associated with Witkop’s syndrome.[10)

At birth, children with familial dysautonomia are diagnosed by a distinct set of symptoms. (FD Facts) Poor muscle tone and lack of tears are two symptoms that can be detected very early. As they get older they have a hard time maintaining body temperature, they hold their breath for long periods of time and have a delay in speech and walking. The cause of these symptoms is due to a defect IKBKAP gene.

One of my cousins suffers from Noonan syndrome, a disorder that affects many areas of his body. There are many manifestations of this genetic disorder. My cousin suffers from unusual facial characteristics, short stature, and skeletal malformations, to list just a few. He has gone through multiple surgeries and faces a lot of daily challenges, including learning difficulties at school. He is never going to be cured of this disorder. He will live to a normal life expectancy barring any extraordinary medical occurrence. Although many of his problems can be medically dealt with so that the disruption to his daily life is minimal, he can never be as tall as the other kids, or look normal, or learn as they do. He is always going to be just “a lot”

Noonan syndrome is an autosomal dominant genetic disease that affects facial characteristics, heart, skeletal formation, stature, and may other areas of the body. Approximately 1 in 1,000 to 2,500 people are affected by Noonan syndrome. Those affected by this disease have deep grooves around their mouth and nose area, low ears, and wide eyes. Other distinct features of Noonan Syndrome include shorter necks, excess skin around the neck, and low hairlines. A common heart defect associated with this disease is the narrowing of the value that controls blood flow from the heart to the lungs. Although an individual may be affected by this syndrome, most still have a normal intelligence. A mutation occurs on the PTPN11, SOS1, RAF1, KRAS, NRAS,

The next technique routinely performed for prenatal diagnosis is amniocentesis. A long needle is inserted into the mother’s uterus to withdraw a sample of amniotic fluid containing cells shed by the fetus. The cells are cultured and analyzed for chromosome abnormalities. Despite the lengthy time in obtaining results because the cells need to be cultured, this method has become widely accepted as a safe and accurate way to determine genetic disorders.

Another symptom of Marfan’s is a long, narrow face. Another noticeable characteristic of someone with this genetic disorder is they tend to have crowded teeth because the roof of the mouth is arched. Some people with this disorder have a breastbone that sticks out or caves in. They may have the disease if they look like they have a curved backbone. People with Marfan’s usually have flat feet also. Most people with Marfan syndrome tend to have problems with the heart and blood vessels. Some people with Marfan syndrome have problems with the eyes, for example, nearsightedness.( Phillips, 2006)

The chromosomal abnormalities include turner's disease, laron dwarfism, noonan syndrome, sinotina wiley syndrome, russell xifushi, mutation / deletion of the short stature homeobox-containing gene, and skeletal dysplasia.

There are three ways that a mother can be tested during pregnancy to see if their child will have Down syndrome. One is amniocentesis, which is the removal and analysis of a small sample of fetal cells from the amniotic fluid. Amniocentesis can not be done until the 14-18th week of pregnancy and with this process there is a lower risk of miscarriage than with the other two processes. Another process is chorionic villus sampling (CVS), which is the extraction of a tiny amount of fetal tissue at 9 to 11 weeks of pregnancy. The tissue is then tested for the presence of extra material from chromosome 21. Chorionic villus sampling has a 1-2% chance of the mother having a miscarriage. The last process is percutaneous umbilical blood sampling (PUBS), which is the most accurate method used to confirm the results of CVS or amniocentesis. During PUBS the tissue is tested for the presence of extra material from chromosome 21. PUBS cannot be done until the 18-22nd week and it carries a high risk of the mother having a miscarriage.

This condition is caused by the deletion of several genes located on the long arm (q arm) of at least one strand of chromosome 7. Some of these genes include LIMK1, CLIP2, and NCF1. Much research is focused on the absence of a gene known as ELN, also known as the elastin gene (Williams syndrome, 2013). Researchers have suggested that the deletion of this gene is a major source of much of the phenotypical symptoms of Williams syndrome

Content: Group one presented over Williams Syndrome. Williams Syndrome is a genetic condition that is caused by a deletion of 26-28 genes on chromosome seven. The more genes deleted, the more severe the characteristics will be. The deletion is also present from conception due to an abnormality of the egg or sperm cell. The syndrome is named after John C. Williams. However, Alois Beuren is also credited for research on Williams, which is why it used to be referred to as Williams-Beuren Syndrome. Williams occurs in less than 20,000 people in the United States! That’s incredibly rare! It is also interesting to know that the disorder affects males and females equally. Some key characteristics of this