As millions of body cells reproduce to develop its different function it tend to have a certain lifespan so new cells replace old ones to avoid malfunctions in the body. When a cell gets old or begins to be erratic, it dies automatically, a process called ´´programmed cell death´´, but when said defective cell doesn’t die, continues to play consistently generating more defective cells which together can generate malignant tumors, depending on the area of the body, they can be into the brain, lung, skin, etc. Unlike malignant tumors, benign tumors do not spread to nearby tissues and not invade. However, sometimes benign tumors can be quite large. When a benign tumor was removed, usually dont grow back, while other malignant tumors sometimes grow back.
These malignant or cancerous cells, because of their malfunction causing serious imbalances in the body area where they are developing and it will continue spreading unchecked throughout the body in a process called ”metastatic disease”, which is nothing less than the expansion of malignant cells throughout the body.
One important difference is that cancer cells are less specialized than normal cells. This means that, while normal cells mature into many different cell types with specific functions, cancer cells do not. This is a reason that, unlike normal cells, cancer cells continue dividing without stopping.
The most dangerous thing is that cancer cells can affect normal cells, giving orders to form blood vessels that can drain oxygen and nutrients to the cancer cells. What about our immune system? Because cancer cells have the ability to evade our immune system and modifying function of this for to can´t be destroyed it ,making them more effective in its expansion throughout the body.
Because these cells can originate anywhere in the body it is difficult to detect, sometimes the genetic factor influences the appearance of this cell abnormality so some are more likely than others to contract cancer. Even prolonged exposure to ultraviolet rays can cause the cells to malfunction, to a too strong fall.
Since we all have the chance of getting cancer it is best to be prevented, having a healthy lifestyle and making an annual check up. Cancer does not warn, prevent it.
Doctors are not sure why some people get cancer and others do not. But they do know that cancer is not contagious. You can not catch cancer from another person. Unlike cold or flu, cancer is not caused by germs. Therefore, you should not be afraid of children (or anyone) with cancer. You can talk to them, play with them and embrace them.