These are collections of very abnormal cells that tend to grow rapidly and without control. These tumors can invade other tissues and organs, and spread to other parts of the body through the bloodstream and through the lymph system. A malignant tumor will first grow only in the organ where it started. This initial tumor is known as the primary tumor. The primary tumor may invade or infiltrate directly into other adjacent organs.
Malignant tumors are very often life-threatening illnesses.
When a cancer or carcinoma does spread it is said to have metastasized . It is a tumor that is in a pre-malignant phase . If not adequately treated, some carcinomas in situ will go on and become invasive and become fully malignant. The information provided through OncoLink should not be used for diagnosing or treating a health problem or a disease. It is not a substitute for professional care.