Cancer is the abnormal/unusual out of control growth of cells in a part of the body. Normal cells divide and grow in an orderly fashion, but cancer cells do not. They continue to grow and crowd out normal cells.

There are many kinds of cancer; they all have in common, this out of control growth of cells.

Cancer occurs as a result of mutations, or abnormal changes, in the genes responsible for regulating the growth of cells and keeping them healthy. The genes are in each cell’s nucleus, which acts as the “control room” of each cell.









 

 

 

 
   

Normally, the cells in our bodies replace themselves through an orderly process. In this process, healthy new cells take over as old ones die out.

But over time, mutations can “turn on” certain genes and “turn off” others in a cell. That changed cell gains the ability to keep dividing without control or order, producing more cells just like it and forming a Tumor.
A Tumor can be benign (not dangerous to health) or malignant (has the potential to be dangerous).


Benign tumors: are not considered cancerous: their cells are close to normal in appearance, they grow slowly, and they do not invade nearby tissues or spread to other parts of the body.


Malignant tumors: are cancerous. Left unchecked, malignant cells eventually can spread beyond the original tumor to other parts of the body.
 
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