malignant tumor(n = noun.state) malignant neoplasm, metastatic tumor - a tumor that is malignant and tends to spread to other parts of the body;
is a kind of neoplasm, tumor, tumour, malignance, malignancy
has particulars: carcinosarcoma, cancer, malignant neoplastic disease, angiosarcoma, myeloma, neuroblastoma, neuroepithelioma, retinoblastoma

   Same as malignancy{4}. [WordNet 1.5]

adipose tumor, benign tumor, brain tumor, ewing's tumor, fibroid tumor, malignant, malignant anaemia, malignant anemia, malignant growth, malignant hepatoma, malignant hypertension, malignant hyperthermia, malignant melanoma, malignant neoplasm, malignant neoplastic disease, malignant neuroma, malignant pustule, metastatic tumor, nonmalignant tumor, papillary tumor, sand tumor, skin tumor, tumor, tumor necrosis factor, tumor virus, wilms' tumor, wound tumor virus