Cancer is not a disease but many diseases that occur in various areas of the body. Each type of cancer cell growth characterized by uncontrolled. In normal conditions, cell reproduction carefully controlled by the body. However, this control function, which resulted in the growth of abnormal cells and the development of a lump, mass, or tumor. Several types of cancer that involves blood and blood forming organs Establishing the tumor but not circulating through other networks in which they grow.

Probably benign tumors (non-cancerous) or malignant (cancerous). The cells from cancerous tumors can spread throughout the body. This process is called metastasis, occurs when cancer cells Removing yourself from the original tumor and travel in the circulatory or lymphatic systems until they lived in a small capillary network in other areas of the body. Common is the site of bone metastases, lung, liver, and central nervous system.

Type of cancer refers to the area or organ where the cancer first occurred. Cancer that has metastasized to other areas of the body is named for the body part to which it belongs. For example, if breast cancer has spread to the bone, it is called “metastatic breast cancer” not bone cancer.