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Trisomy 18 is a condition where you have three copies of each chromosome 18 in your body's cells instead of two. This can lead to serious physical and mental disabilities.
Edwards syndrome, also known as trisomy 18, is a very severe genetic condition that affects how your child’s body develops and grows. Children diagnosed with trisomy 18 have a low birth weight, multiple birth defects and defining physical characteristics.
Trisomy 18, or Edwards syndrome, occurs when a fetus has an extra chromosome 18. This rare condition can affect development and may have a poor outlook.
Trisomy 18 is a chromosomal abnormality characterized by the presence of an extra copy of genetic material on the 18th chromosome, either in whole (trisomy 18) or in part (such as due to translocations).
Disease Overview. Trisomy 18 is a rare chromosomal disorder in which all or a critical region of chromosome 18 appears three times (trisomy) rather than twice in cells of the body. In some children, trisomy 18 may be present in only a percentage of cells, whereas other cells contain the typical chromosomal pair (mosaicism).
Trisomy 18 happens when there is an extra copy of chromosome 18 in either the egg or the sperm before conception. This means that the baby will have three copies of chromosome 18 instead of two. The extra chromosome can cause differences in the way a baby develops.
Edwards' syndrome, also known as trisomy 18, is a rare but serious condition. Edwards' syndrome affects how long a baby may survive. Sadly, most babies with Edwards' syndrome will die before or shortly after being born.
Genetic Basis. Trisomy 18 occurs when there are three copies of chromosome 18 in every cell of the body. Typically, humans have two copies of chromosome 18. Sometimes, a baby will inherit an extra chromosome 18 from a parent. Therefore, the baby has three copies of chromosome 18 rather than two copies. (In the diagram above, the chromosome ...
Trisomy 18 (also called Edwards syndrome) is a genetic condition in which chromosome 18 is a triplet instead of a pair. Like the more commonly known Trisomy 21 (Down syndrome), Trisomy 18 affects all systems of the body and causes distinct facial features.
Trisomy 18 is a chromosome disorder characterized by having 3 copies of chromosome 18 instead of the usual 2 copies. Signs and symptoms include severe intellectual disability; low birth weight; a small, abnormally shaped head; a small jaw and mouth; clenched fists with overlapping fingers; congenital heart defects; and various abnormalities of ...