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About Sickle Cell Disease
Sickle Cell Disease is a genetic
blood disorder that occurs in one of every 500
African Americans, the predominant population
impacted by it in the United States. To the
naked eye a drop of blood is just one red mass.
Viewed under the microscope however, one sees a
lot of red bodies called cells. Though normally
the red cells are round, in some individuals
some of the red cells are shaped like a farmer's
sickle. They're called sickle cells and the
disease produced by them is known as Sickle Cell
Anemia.
In order to understand Sickle Cell Anemia you
need to know that all red blood cells contain a
red substance called hemoglobin. Hemoglobin
carries oxygen from the lungs to all parts of
the body. The normal red cell contains normal
hemoglobin; when it releases the oxygen it
carries its shape remains round. But if the cell
contains what is known as sickle hemoglobin,
when it releases its oxygen the red cell's shape
can change to a sickle. In other words red cells
become sickle shaped because they contain sickle
hemoglobin which is different from normal
hemoglobin.
You might ask now what is wrong with having red
cells that are shaped like a sickle? Well,
although sickle hemoglobin carries just as much
oxygen as normal hemoglobin there are two
important differences between sickled cells and
the normal round cells. First, sickled cells
flow differently in blood vessels. Round red
cells are soft like a bag of jelly so their
shape can be changed readily permitting them to
flow through small blood vessels very easily.
But sickle cells are hard like pieces of wood
and tend to jam up in small blood vessels. The
flow of blood then stops.
The second problem with sickle cells is that
they do not last as long as normal red blood
cells. Normal round red cells live about 120
days. Sickled red cells are more fragile than
normal red cells and live for less than 60 days.
The body cannot make red cells as fast as the
sickle cells are being broken down. As a result
the body has fewer red cells and less hemoglobin
than normal, and this we call anemia. All of the
medical problems in Sickle Cell Anemia are the
result of either the plugging of blood vessels
with sickle cells or the anemia.
Individuals have who have Sickle Cell Anemia
have pain that might occur at any time in any
part of the body. The pain might last for only a
few minutes or for as long as a week or two. The
pain might be so mild that aspirin relieves it
or it might be severe enough to require hospital
treatment. The pain occurs when sickle cells
plug blood vessels and stop the flow of blood.
Because of the anemia they usually tire easily.
Some individuals have slow healing sores or
ulcers on their legs. Some have gallstones and
some have strokes. In addition to these and
other problems, the life span of some
individuals with Sickle Cell Anemia is
shortened.
Although they tend to tire easily, in between
the pain attacks, called sickle cell pain
crises, children can play (they should not try
to play on school teams) and go to school (their
intelligence is not affected). Adults are able
to work if the job is not too strenuous.
Unfortunately, no cure has been discovered for
Sickle Cell Anemia.
You are born with it and you have it all of
your life. Primarily, to treat it doctors give
medicine for the pain and blood transfusions are
given when the number of red cells and quantity
of hemoglobin in the body is too low.
It is important for you to know that everyone
who has sickle hemoglobin in their red blood
cells does not have Sickle Cell Anemia. Some are
just carriers of the disease and the condition
they have is called
Sickle Cell Trait.
Incidence of Some Important
Childhood Diseases
| Sickle Cell Anemia |
1:500 |
| Diabetes Mellitus |
1:2,500 |
| Acute Leukemia |
1:2,880 |
| Cystic Fibrosis |
1:2,940 |
| Muscular Dystrophy |
1:5,000 |
| Phenylketonuria (PKU) |
1:10,000 |
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|
Thalassemia - 2 million with
trait in US
Estimated 35,000 Greeks and Italians have trait
in Chicago area |