What is cancer?

What is cancer?

Some cells in the body do not stop dividing, spread to surrounding tissues and invading, the cancer appears.
Cancer can start in almost every part of the human body, made up of tens of trillion cells. In general, human cells grow and divide to fill new parts of the body with new cells. Old cells, damaged cells are killed, and new cells replace cells that were previously in place.
As the cells move away from normal
But when cancer begins, this systematic order breaks down. As the cells become more and more normal, they become scarred or old cells die and new cells form. If the cell does not stop dividing, it will become a tumor.
Many cancers are made of massive solid tumors. Blood cancers such as leukemia are not solid tumors.
Tumors can be divided into malignant tumors and benign tumors.
Malignant tumors spread to nearby tissues or penetrate surrounding tissues. And as this malignant tumor grows, the cancer cells can separate and migrate to the blood or lymphatic system and go to other parts of the body to make new tumors that are different from the original.
Benign tumors do not spread or invade surrounding tissues. Benign tumors may be very large in size. When benign tumors are resected, they can sometimes develop into malignant tumors, but in many cases they do not. However, unlike most benign tumors, benign brain tumors are often life-threatening.

Differences between Cancer Cells and Normal Cells
Cancer cells are fundamentally different from normal cells. Cancer cells do not stop out of order and grow bigger. As the organization grows, it invades the organization and destroys the organization. There are important differences, cancer cells are less specialized than normal cells. In other words, normal cells mature into completely different cells with specific functions, and certain functions are obtained, but cancer cells do not have such a function. Unlike normal cells, cancer cells continue to divide without stopping.
Cancer cells ignore signals that initiate a programmed process known as apoptosis or cell death to stop cells from dividing or to remove unwanted cells. So cell division does not stop. Cancer cells that are supposed to disappear do not disappear. .
Cancer cells can rejuvenate blood vessels in nearby normal cells, drawing oxygen and nutrients to cancer cells. These blood vessels also remove the waste of the tumor.
And cancer cells avoid the immune system. The content of cancer cells hiding in the immune system will be discussed in other articles. The immune system is a special protective system that protects organs, tissues and cells. The immune system precisely removes damaged cells or abnormally formed cells, but cancer cells can hide from the monitoring of the immune system.

Causes of cancer development

Cancer is caused by a change in the genetic tool gene. The genes are arranged on long strands of tightly packed DNA called chromosomes.


Cancer is a genetic disorder. The change in the gene itself, which controls cell function, causes cells to stop dividing and the tissue becomes cancerous.
The phenomenon of cancer is known to be inherited from parents. But I do not believe that cancer is inherited. Whether or not I do not think I am inherited. Cells can be exposed to abnormality of division or constant exposure to a specific environment, resulting in DNA damage in the cell, which can occur throughout life due to an error in cell function.
Environmental exposure that causes cancer includes chemicals in the smoke during the smoking period and ultraviolet and cosmic radiation from the sun.
Cancer has a unique genetic change in the cell. As the cells continue to divide and the cancer continues to grow, another change can take place in cancer cells. Even within the same tumor, cells can have different genetic changes.
In general, cancer cells are more genetic changes that are mutations of DNA than normal cells. The most important part of cancer is the mutation of the DNA in the cell, and we will discuss why the DNA mutation is going to happen in the future. The cause of the answer is in our life.

Many people think that when they have cancer they are not fortunate or why they have cancer, but there is no cause in the world. The cause is almost all made by oneself rather than by others.