A term for diseases in which abnormal cells divide without control and can invade nearby tissues. Malignant cells can also spread to other parts of the body through the blood and lymph systems. There are several main types of malignancy. Carcinoma is a malignancy that begins in the skin or in tissues that line or cover internal organs. Sarcoma is a malignancy that begins in bone, cartilage, fat, muscle, blood vessels, or other connective or supportive tissue. Leukemia is a malignancy that starts in blood-forming tissue, such as the bone marrow, and causes large numbers of abnormal blood cells to be produced and enter the blood. Lymphoma and multiple myeloma are malignancies that begin in the cells of the immune system. Central nervous system cancers are malignancies that begin in the tissues of the brain and spinal cord. Also called cancer. There are a few principle sorts of danger. Carcinoma is a harm that starts in the skin or in tissues that line or spread inside organs. Sarcoma is a harm that starts in bone, ligament, fat, muscle, veins, or other connective or strong tissue. Leukemia is a harm that begins in blood-framing tissue, for example, the bone marrow, and makes huge quantities of unusual platelets be delivered and enter the blood. Lymphoma and different myeloma are malignancies that start in the cells of the resistant framework. Focal sensory system tumors are malignancies that start in the tissues of the cerebrum and spinal rope. Likewise called disease.