Facts
About Down Syndrome
Down syndrome is a genetic condition,
resulting when a baby is born with
three, rather than the usual two,
copies of chromosome 21. Because
there are three copies of chromosome
21, Down syndrome is also called
trisomy 21. With the third 21st
chromosome existing in every cell,
it is not surprising to find that
every system in the body is affected
in some way. Although, not every
person with Down syndrome has the
same problems or associated conditions.
Down syndrome is the most frequent occurring chromosomal abnormality, occurring once in every 690 live births. Over 350,000 people in the
United States have Down syndrome. While the age of the mother can be
a factor, 80% of children with Down
syndrome are born to parents under
the age of 35 (the average age is
26).
When a child with Down syndrome
is born, many people - from experts
to family members - will tell parents
they "know" what the child
will accomplish. While there are
guidelines regarding physical and
cognitive development, it is impossible
to predict the future of a child
with Down syndrome - just as it is
for any other child. No professional
can look at a child and tell you
how intelligent, successful or independent
he or she will be in 20, 30 or 50
years.
Some of the medical problems associated
with Down syndrome:
- Between 40 to 60% of all infants
with Down syndrome have some type
of heart defect.
- Hypotonia (low muscle tone) is
another common feature, which is
the cause of not only delayed gross
motor development like crawling
and walking, but also constipation
and gastroesophageal reflux.
- Seizures occur in 5 to 10% of
people with Down syndrome.
- Those with Down syndrome are
at greater risk for leukemia, sleep
apnea, hypothyroidism, celiac disease
and diabetes.
- The prevalence of autism or autistic
spectrum disorders is estimated
to be between 5 and 7%.
- Atlantoaxial instability (AAI),
which is caused by excess movement
between the first and second vertebrae
in the neck, occurs in approximately
15% of youths and causes a potential
risk of spinal cord damage.
People with Down syndrome are active
participants in the community; schools,
jobs and leisure activities. Some
live with family, some with friends,
and some independently.
At the beginning of the 20th century,
there were close to 100,000 children
in institutions - many of those were
children with Down syndrome with
a dismal existence and a life expectancy
of 9 years. The gains made in the
last third of the century in education,
employment, and community living
can, and must be, further broadened.
The new century offers the possibility
of unparalleled opportunities for
individuals with Down syndrome. Life
expectancy for a baby born today
with Down syndrome is 55-60 years.
This is the first generation of
individuals with Down syndrome to
age. Many health care professionals
are just beginning to understand
what is "normal" aging
and what may be certain conditions specific to Down
syndrome. For example, there has been a tendency to
over-diagnose Alzheimer's disease in those with Down
syndrome because there is a close connection. Yet only
20 to 25% of all adults with Down syndrome show any
of the dementia or cognitive decline that is the hallmark
of Alzheimer's disease.
Research in Down syndrome is funded
at an extremely low level compared
to other disabilities. We must continue
to increase funding since the key
to also unlocking the problems associated
with Down syndrome lies on the 21st
chromosome. For example, current
researchers say that raising the
IQ points of an individual with Down
syndrome by 20 points is not out
of the question.
People with Down syndrome want to
be accepted. They want to be included.
They wish to be provided with choices
and opportunities. People with Down
syndrome have goals and dreams. They
want to be heard and given the same
respect as everyone else. Individuals
with Down syndrome are thinking and
feeling people, and they want to
be treated as such. They want the
same quality of life as everyone
else.
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