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Down syndrome or Down's syndrome, [12] also known as trisomy 21, is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21. [3] It is usually associated with developmental delays, mild to moderate intellectual disability , and characteristic physical features.
Transient myeloproliferative disease develops and may be of concern in fetuses. Features in a review of 39 reported fetal cases include: reduced platelet production often accompanied by significantly reduced levels of circulating platelets; reduced red blood cell production sometimes accompanied by mild anemia; increased levels of circulating megakaryoblasts and white blood cells; grossly ...
Down Syndrome Treatment There is no way to prevent or cure Down syndrome. But through education, support groups and the right team of health care providers, a child with Down syndrome can go on to ...
Infantile epileptic spasms syndrome appears in 1% to 5% of infants with Down syndrome. IESS in those with Down syndrome is milder, more responsive to treatment (due to unknown reasons), and less likely to evolve into Lennox-Gastaut syndrome or other forms of epilepsy. [citation needed] A child with Down syndrome presenting with seizures that ...
A directory published by the Global Down Syndrome Foundation lists just 15 medical programs nationwide that are housed outside of children’s hospitals and that accept Down syndrome patients who ...
The disease is restricted to individuals with Down syndrome or genetic changes similar to those in Down syndrome, develops during pregnancy or shortly after birth, and resolves within 3 months, or in about 10% of cases, progresses to acute megakaryoblastic leukemia. [33] [30] [34]
[10] Treatment varies depending on the defect in question. [7] This may include therapy, medication, surgery, or assistive technology. [7] Birth defects affected about 96 million people as of 2015. [11] In the United States, they occur in about 3% of newborns. [8] They resulted in about 628,000 deaths in 2015, down from 751,000 in 1990.
In rare cases this translocation results in Down syndrome and Patau syndrome. [2] Robertsonian translocations result in a reduction in the number of chromosomes. A Robertsonian evolutionary fusion, which may have occurred in the common ancestor of humans and other great apes, is the reason humans have 46 chromosomes while all other primates ...