Down Syndrome
Alternate Names : Trisomy 21
What are the signs and symptoms of the condition?
The following characteristics can be seen in people with Down syndrome:
smaller-than-average physical size
poor muscle tone, which tends to improve somewhat over time
a small head, the back of which is flatter than average
flat facial profile
upward slant of the eye slits
an extra fold of skin at the inner corners of the eyes
small mouth with a tendency to protrude the tongue
small hands with short fingers and a single crease across the palms
congenital heart disease, or heart defects that are present at birth
learning disabilities
an IQ that is rarely higher than 50 (with normal IQ being around 100)
faster aging process, with a tendency to develop diseases of aging, such as Alzheimer's disease, at a relatively early age
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