Cancer

Cancer is a disease caused by cells that have lost normal growth controls and that invade and destroy other tissues.Eventually,damage to vital organs caused by cancer may be fatal.A cancerous tumor is called a malignant tumor.

           Cells in almost any part of the body can become cancerous .When a cancer arises,it usually grows for a while in the part of the body where it began-sometimes for years.

           Eventually,however,some of the cancer cells may metastasize,or move to other parts of the body.The cancer cells often travel through the blood or lymph fluid and give rise to new malignant tumors.