How Cancer Cell Outgrow?

When cells in the body grow out of control, cancer started to form. In normal human body, cell grow, divide, and die. On the other hand, cancer cells refues to die and instead it continues to grow and form new, abnormal cells onto other tissues. Cells become cancer cells because of damage to DNA. DNA is in every cell and directs all its actions. In a normal cell, when DNA gets damaged the cell either repairs the damage or the cell dies. In cancer cells, the damaged DNA is not repaired, but the cell doesn’t die like it should. Instead, this cell goes on making new cells that the body does not need. These new cells will all have the same damaged DNA as the first cell does.

What Form Breast Cancer?

Certain changes in DNA can cause normal breast cells to become cancer. DNA is the chemical in each of our cells that makes up our genes -- the instructions for how our cells work. Some inherited DNA changes (mutations) can increase the risk for developing cancer and cause the cancers that run in some families. For instance, BRCA1 and BRCA2 are tumor suppressor genes -- they keep cancer tumors from forming. When they are changed (mutated), they no longer cause cells to die at the right time, and cancer is more likely to develop.

But most breast cancer DNA changes happen in single breast cells during a woman's life rather than having been inherited. So far, the causes of most of the DNA mutations that could lead to breast cancer are not known.

"What Causes Breast Cancer?" American Cancer Society :: Information and Resources for Cancer: Breast, Colon, Prostate, Lung and Other Forms. Web. 19 Apr. 2011. <https://www.cancer.org/cancer/breastcancer/overviewguide/breast-cancer-overview-what-causes>.