neoplasm, tumor, tumour - an abnormal new mass of tissue that serves no purpose

carcinosarcoma - a malignant neoplasm composed of carcinoma and sarcoma extensively intermixed

malignance, malignancy - (medicine) a malignant state; progressive and resistant to treatment and tending to cause death

cancer, malignant neoplastic disease - 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

angiosarcoma - 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

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

neuroblastoma - malignant tumor containing embryonic nerve cells; usually metastasizes quickly

neuroepithelioma - malignant tumor of the neuroepithelium

retinoblastoma - malignant ocular tumor of retinal cells; usually occurs before the third year of life; composed of primitive small round retinal cells