How does a tumor grow?

How does a tumor grow?

Tumors are formed from genetic mutation of normal cells. The cells that are mutated begins to multiply and spreading without stopping.There are 4 different stages of how a tumor grow. Oncogenes changes the normal cells to the cancer cells by alternating the dividing signals. During this process, suppressors would attempt to stop the spread of these cancer cells. However, the cancer cells will usually overtake the suppressors and continue to grow. Some cells can go through the process,apoptosis, which is the process where the cells "self-destruct". However, once the cells become a cancer cell, it is impossible for the cells to undergo apoptosis. Many scientists have developed drugs to resist the spread of tumors, but the cells that survive the drugs spreads new drug-resistant cells.