Cancer—it’s scary word,
and a scary disease. Cancer kills a lot of people all over the world. Only
heart disease kills more Americans.
But there’s good news
too. Millions of people who have had cancer are still alive. Doctors have
learned a great deal about treating and preventing cancer.
WHAT IS
CANCER?
Cancer is not a single
disease. It includes more than 100 different diseases. They may affect any part
of the body. But they have one thing in common. They are all caused by cells
that are out of control.
All living things are
made up of cells. An adult human body has about 30 trillion cells—that’s
30,000,000,000,000! Cells reproduce (make more cells) by dividing in half. In
an adult body, about 25 million cells divide every second. That’s how the body
heals itself.
Sometimes a cell goes
out of control and divides over and over. And that’s what cancer is—unhealthy
cells, growing and reproducing out of control. These cells are said to be
cancerous.
WHY CANCER IS
DANGEROUS
When cancerous cells multiply,
they form clumps called tumors. Tumors can interfere with important body
processes. Cancer of the lungs, for instance, interferes with breathing. Cancer
of the stomach interferes with digesting food.
Cancerous cells can also
spread to other parts of the body. Then new tumors form. This spreading is
called metastasis. Cancer that has metastasized is the most dangerous.
When cancer attacks several parts of the body, it is hard to stop.
HOW DOCTORS
TREAT CANCER
The best weapon against
cancer is detecting it at an early stage before it grows very much. Regular
checkups by a doctor can detect cancer before it grows and spreads. People
whose cancers are discovered early usually survive.
Some cancerous tumors
can be removed by surgery. Doctors must remove some surrounding healthy cells,
too, to be sure they get all the cancerous cells.
Radiation, such as X rays,
can also kill cancer cells. So can treatment with powerful drugs, called chemotherapy.
Unfortunately these treatments destroy healthy cells too. They can make people
very sick. Newer treatments encourage the body’s own disease-fighting immune
system to destroy cancer cells. But the newer treatments don’t work for all
types of cancer.
WAYS TO
PREVENT CANCER
There is no sure way to
avoid cancer. But there are things people can do to greatly reduce the risk of
getting cancer.
Smoking causes cancer.
People who smoke get lung cancer 20 times more often than people who don’t
smoke. Don’t smoke!
Doctors suspect that eating
certain foods can also increase the chances of getting cancer. Eating lots of
red meat and other foods high in saturated fat may make people more likely to
develop cancer.
Most skin cancer is caused
by too much Sun. Avoid getting sunburned. If everyone wore sunscreen or stayed
out of the Sun, most cases of skin cancer would be prevented.
