Down syndrome - Symptoms and causes - Mayo Clinic
Nov 12, 2024 · Down syndrome is a genetic disorder caused when abnormal cell division results in an extra full or partial copy of chromosome 21. This extra genetic material causes the developmental changes and physical features of Down syndrome. Down syndrome varies in severity among individuals, causing lifelong intellectual disability and developmental delays.
Down Syndrome - NICHD - Eunice Kennedy Shriver National …
Nov 22, 2023 · Down syndrome is a set of cognitive and physical symptoms that result from having an extra chromosome 21 or an extra piece of that chromosome. It is the most common chromosomal cause of mild to moderate intellectual disabilities. People with Down syndrome are at risk for several other health conditions.
Down syndrome - Diagnosis and treatment - Mayo Clinic
Nov 12, 2024 · People with Down syndrome can live fulfilling lives. Most people with Down syndrome live with their families, in supported living settings or independently. With needed support, most people with Down syndrome go to mainstream schools, read and write, make decisions, have friends, enjoy an active social life, and have jobs.
Síndrome de Down - Síntomas y causas - Mayo Clinic
Mar 8, 2018 · Algunos niños con síndrome de Down presentan anomalías gastrointestinales, que pueden comprender anomalías de los intestinos, el esófago, la tráquea y el ano. Pueden presentar mayor riesgo de tener problemas digestivos, como obstrucción gastrointestinal, acidez estomacal (reflujo gastroesofágico) o enfermedad celíaca.
About Down Syndrome | NICHD - NICHD - Eunice Kennedy Shriver …
Nov 22, 2023 · Generally, children with Down syndrome reach key developmental milestones later than other children. 2 People with the syndrome are also more likely to be born with heart abnormalities, and they are at increased risk for developing hearing and vision problems, Alzheimer’s disease, and other conditions. 1 However, with appropriate support and ...
Down Syndrome | NICHD - NICHD - Eunice Kennedy Shriver …
Nov 30, 2023 · Down syndrome is a set of cognitive and physical symptoms that result from having an extra chromosome 21 or an extra piece of that chromosome. It is the most common chromosomal cause of mild to moderate intellectual disabilities. People with Down syndrome also have some distinct physical features, such as a flat-looking face, and they are at risk for a …
What are the symptoms of Down syndrome? - NICHD
The symptoms of Down syndrome vary from person to person, and people with Down syndrome may have different problems at different times of their lives. Physical Symptoms. Common physical signs of Down syndrome include 1, 2: Decreased or poor muscle tone; Short neck, with excess skin at the back of the neck; Flattened facial profile and nose
What causes Down syndrome? | NICHD - NICHD - Eunice Kennedy …
Jun 11, 2012 · Almost all Down syndrome cases result from complete trisomy 21. 1, 2, 3; Mosaic trisomy 21. Not every cell in the body is exactly the same. In a small percentage (less than 5%) of Down syndrome cases, most of the cells in the body have the extra chromosome, but some of them don’t. This is called “mosaicism.”
What conditions or disorders are commonly associated with Down …
Jun 22, 2012 · Infants with Down syndrome have a 62-fold higher rate of pneumonia, especially in the first year after birth, than do infants without Down syndrome, for example. 2 Hypothyroidism. The thyroid is a gland that makes hormones the body uses to …
متلازمة داون - الأعراض والأسباب - Mayo Clinic (مايو كلينك)
متلازمة داون اضطراب ورثي يسببه الانقسام غير الطبيعي في الخلايا مما يؤدي إلى زيادة النسخ الكلي أو الجزئي في الكروموسوم 21. وتسبب هذه المادة الوراثية الزائدة تغيرات النمو والملامح الجسدية ...