So what is cancer anyway?
From Wikipedia,
Cancer 
i/ˈkænsər/,
known medically as a malignant neoplasm, is a broad group of diseases involving unregulated
cell growth. In cancer, cells divide
and grow uncontrollably, forming malignant tumors, and invade nearby parts of
the body. The cancer may also spread to
more distant parts of the body through the lymphatic system or bloodstream.
Not all tumors are cancerous; benign tumors do
not invade neighboring tissues and do not spread throughout the body. There are
over 200 different known cancers that affect humans.[1]
i/ˈkænsər/,
known medically as a malignant neoplasm, is a broad group of diseases involving unregulated
cell growth. In cancer, cells divide
and grow uncontrollably, forming malignant tumors, and invade nearby parts of
the body. The cancer may also spread to
more distant parts of the body through the lymphatic system or bloodstream.
Not all tumors are cancerous; benign tumors do
not invade neighboring tissues and do not spread throughout the body. There are
over 200 different known cancers that affect humans.[1]
In other words
Your
body is made up of millions and millions of cells. Cells are like building
blocks, like Lego, that work together to help your body to do all the things it
needs to do...Each cell plays a special role in the body. They form together to
make tissues like skin, lung or heart.
When
you have cancer some healthy good cells get out of control and change into sick
bad cells. These sick bad cells push your healthy good cells out of the way.
They grow fast and strong and they go where they are not supposed to,
and invade nearby parts of your body
When
sick bad cells clump together they form a lump called a tumor.
Sick
cells stop your body from working the way it should. That’s why you start to
feel tired and sore.
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