A tumor is an irregular mass of cells. Tumors can either be kind (non-dangerous) or threatening (carcinogenic). Benign Tumors develop locally and don't spread. Subsequently, kindhearted tumors are not viewed as malignant growth. They can in any case be risky, particularly in the event that they press against fundamental organs like the cerebrum. Malignant tumors can spread and attack different tissues. This procedure, known as metastasis, is a key element of malignant growth. There are a wide range of sorts of harm dependent on where a malignancy tumor begins. Metastasis is the procedure whereby disease cells break liberated from a dangerous tumor and travel to and attack different tissues in the body. Malignancy cells metastasize to different destinations by means of the lymphatic framework and the circulation system. Malignant growth cells from the first—or essential—tumor can head out to different destinations, for example, the lungs, bones, liver, cerebrum, and different regions. These metastatic tumors are "auxiliary malignancies" since they emerge from the essential tumor. Metastatic malignancy holds the name of the essential disease. For instance, bladder malignancy that metastasizes to the liver isn't liver disease. It is called metastatic bladder malignant growth. Metastasis is critical in light of the fact that it decides the organizing and treatment. A few kinds of metastatic disease are treatable, yet many are most certainly not. Malignancies that start in the tissues of the cerebrum and spinal rope. Likewise called disease.