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Hemochromatosis aka Iron
Overload Hemochromatosis or iron overload is one of the most
common inherited diseases in the U.S. and yet youve probably never heard
of it. About one in 250 Americans has two copies of the mutated gene
responsible for the disease. The gene is most prevalent in people of northern
European descent and in men more than women because menstruation and childbirth
re-moves some of the bodys excess iron. Hemochromatosis occurs
when the intestine absorbs too much iron from food. Most people store 24
grams of iron while those with iron overload may accumulate 20 or more grams.
Iron is normally stored in the bone marrow, but in people with the defective
gene, iron may settle into the liver, pancreas, heart, skin, and pituitary
gland. When large quantities of iron collect in these vital organs, it may
injure the cells and cause potentially fatal problems. The majority of
people with iron overload dont know they have it because they are
symptom-free or the diseases symptoms fatigue, weight loss, joint
pain, infertility (in both men and women), early menopause, and loss of libido,
dont occur until the 40s or older when they may be attributed to other
conditions. The disease, once thought to be rare, is often an unsuspected cause
of some cases of arthritis, diabetes, congestive heart failure, and liver
disease. The liver is usually the first organ to be affected by iron overload.
Over time, liver deposits cause scarring or cirrhosis which destroys the
livers ability to manufacture proteins and remove toxic chemicals from
the blood. Liver failure causes approximately 25% of deaths from untreated
hemochromatosis. Between 10-30% of those with cirrhosis develop liver cancer.
Alcohol accelerates the progression of liver disease so patients should avoid
all alcohol. When the heart accumulates iron, arrhythmia (irregular heartbeat)
or congestive heart failure may result. The pituitary gland makes hormones that
control sex organs. Iron overload in the pituitary can cause a mans
testicles to shrink and in both men and women, a loss of libido and/or
fertility. In advanced cases of hemochromatosis, iron may accumulate in the
skin, giving it a bronze or gray tone. Diabetes is common in people
with untreated hemochromatosis because high amounts of iron destroy the
pancre-atic cells responsible for making insulin. Because it often goes
unrecognized, all diabetics should ask their physicians to request a screening
for hemochromatosis. The blood tests used to detect hemochromatosis
are simple and inexpensive. The bodys iron stores are gauged by three
blood measurements. When these three measurements are evaluated together,
hemochromatosis can be diagnosed about 90% of the time.
- The amount of iron present. The normal range for men is
70150 micrograms per deciliter and 80150 micro-grams per deciliter
for women.
- The degree to which transferrin (a protein that
transports iron in the blood to the liver, spleen, and bone marrow) is
saturated with iron. Normal transferrin levels range from 220400
micrograms per deciliter, 65170 mcg of which are bound to iron
- Ferritin the storage form of iron level is
directly related to the amount of iron stored in the body.
Given the high incidence of the gene mutation and the fact
that symptoms generally dont occur until middle age, people most at risk
those of northern European descent would be wise to be tested.
For an accurate test, do not take any supplements containing iron for at least
a week and preferably, two weeks and do not eat for at least 8 hours prior to
having the blood test performed.
If the blood tests confirm high iron levels, a liver biopsy
may be recommended to determine the degree of liver damage. At present, liver
biopsy is the gold standard for diagnosing hemochromatosis. Genetic
testing is used primarily to confirm a diagnosis or to identify affected family
members. First-degree relatives of someone with hemochromatosis should be
screened for the disease.
Treatment for hemochromatosis involves removing blood from
the body, known as phlebotomy. A pint of blood is drawn weekly for up to two
years, depending on how much iron has accumulated. Each pint removes 200 to 250
milligrams of iron from the body about the amount of excess iron
absorbed by the intestine over three months. Once a patients iron level
is normalized, phlebotomy every three to four months is usually enough to
prevent further accumulation. Patients who begin treatment before developing
organ damage generally have a normal life-span. In more advanced cases,
phlebotomy slows or halts further organ damage. |