What is cancer? How does cancer occur?

Hello, today we are going to tell you what breast cancer is and how cancer occurs. :)

What is breast cancer?   

• Breast cancer is an uncontrolled growth of breast cells.

How does breast cancer occur?

• 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 at the "control room" of each cell. Normallly, the cells in our bodies replace themselves through an orderly process, which we are sure you all know about, cell growth in which healthy cells replace old cells in our bodies. 

• However, over time, mutations can "turn on" certain genes in our bodies and "turn off" others in a cell. That changed cell will then gain the ability to keep dividing without control or order. Thus, it produces more cells just like it and forms a tumour.   

Tumours 

    A tumour can either be :

• not dangerous to health ( benign )  
•  have the potential to be dangerous ( malignant )

Stages of breast cancer