Down syndrome

Overview

What is Down syndrome?

Down syndrome is a genetic condition in which a person has an extra copy of all or part of chromosome 21. The extra genetic material from this extra copy affects how a person develops and leads to mild to moderate intellectual disability, developmental delay, and several associated medical problems.

People with Down syndrome have common physical features including: short stature, low muscle tone, flattened face (especially the bridge of the nose), almond shaped eyes that slant upwards, small ears, a protruding tongue, a single line across the palm of the hand, and in some individuals, tiny white spots on the colored part of the eye.

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Are there other names for Down Syndrome?

What is the usual abbreviation for Down Syndrome?

How common is Down syndrome?

What is the life expectancy of someone with Down syndrome?

Are there other names for Down Syndrome?

Down syndrome is also known as trisomy 21, 47,XX,+21, and 47,XY,+21. Long ago, Down syndrome was referred to by the term "mongolism"; however, this is an outdated and offensive term and should no longer be used. Down's syndrome is also no longer used as the apostrophe is being eliminated from names.

References
What is the usual abbreviation for Down Syndrome?

Down Syndrome is most often abbreviated as DS. Medical professionals also commonly abbreviate Down syndrome as T21, t21, or tri21 as a shortened version of its alternate name, "trisomy 21."

How common is Down syndrome?

Approximately one of every 700 babies born in the United States is born with Down syndrome. Down syndrome is a condition that is considered to be “pan-ethnic.” This means that it occurs in all races and ethnicities.

What is the life expectancy of someone with Down syndrome?

The life expectancy of someone with Down syndrome is much higher than in years past. Because of better health care, awareness, and community resources, many people with Down syndrome live into their 60s.

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