Cancer is a disease that term is used where there is abnormal cell division with no control and can spread to the surrounding network. Cancer cells can spread to other parts of the body through the bloodstream and lymphatic system. Malignant tumor is called cancer. Cancer has the potential to attack and damage the network and cause the adjacent Metastasis. According to the concept of the present disease is cancer genes. A normal cell can become a cancer cell by various reasons when the imbalance occurred between onkogen function of genes with tumor suppressor in the process of growing flowers and a cell. Change or mutation that caused a gen hiperekspresi onkogen or less and / loss of function of genes suppressor cause tumor cells to grow and develop uncontrollable. This change goes in some stage or known to the multi step carcinogenesis process.

Cancer is not only one type of disease but several diseases. More than 100 types of cancer have been found. Most of the cancer called appropriate organ or cell type in which cancer cells start to be. For example, cancer that starts in kolon called kolon cancer, cancer that occurs the first time in the cells of the skin scar karsinoma cells called basalt.

Here are some categories of cancer:

1. Carcinoma: cancer that starts from the skin or tissue that protects the organs inside.
2. Sarcoma: cancer that occurs in the bone, the network vulnerable to bone, fat, muscle, blood vessel, or the network.
3. Leukaemia: cancer that occurs in the network that produces blood, such as bone marrow and cause the increase in the number of abnormal blood cells.
4. Lymphoma and Myeloma: Cancer that occurs in the immunity system
5. The nerve centre of cancer: cancer that occurs in the brain networks and bone marrow.

At the origin of cancer

Cancer begins in cells, which is the basic unit of life. Our bodies consist of a variety of cell types. Some cells grow and split with a useful control to make the body stay healthy. When old or damaged cells, the cells will be replaced with new cells.

But sometimes this process does not comply with the normal, the genetic material in cells (DNA) can be damaged or changed. There was a mutation that gives a change in the growth of cells, this occurs when cells do not die as cells normally and that no new cells replace the dead. These extra cells can grow into a network in the tumor. Tumor growth is a network here that is not biologically normal. Growth may become malignant (malignant) or benign (benign). A benign tumor is not cancer, this tumor was the easy operation, and most do not grow again after and was not spread to the other members of the body. Conversely, cancer is a malignant tumor. Tumor cells can spread in the nearest network and spread in other parts of the body. The spread of cancer cells to other parts of the body called Metastasis.