an abnormal new mass of tissue that serves no purpose

(medicine) a malignant state; progressive and resistant to treatment and tending to cause death

a malignant neoplasm composed of carcinoma and sarcoma extensively intermixed

any malignant growth or tumor caused by abnormal and uncontrolled cell division; it may spread to other parts of the body through the lymphatic system or the blood stream

a rare malignant neoplasm arising from vascular tissue; usually occurs in the breast and skin and is believed to originate from the endothelial cells of blood vessels

a tumor of the bone marrow (usually malignant) composed of cells normally found in bone marrow

malignant tumor containing embryonic nerve cells; usually metastasizes quickly