| tumor | | |
| n. (state) | 1. neoplasm, tumor, tumour | an abnormal new mass of tissue that serves no purpose. |
| ~ growth | (pathology) an abnormal proliferation of tissue (as in a tumor). |
| ~ acanthoma, skin tumor | a neoplasm originating in the epidermis. |
| ~ angioma | a tumor consisting of a mass of blood or lymphatic vessels. |
| ~ benign tumor, benign tumour, nonmalignant neoplasm, nonmalignant tumor, nonmalignant tumour | a tumor that is not cancerous. |
| ~ blastocytoma, blastoma, embryonal carcinosarcoma | a tumor composed of immature undifferentiated cells. |
| ~ brain tumor, brain tumour | a tumor in the brain. |
| ~ carcinoid | a small tumor (benign or malignant) arising from the mucosa of the gastrointestinal tract; usually associated with excessive secretion of serotonin. |
| ~ celioma | an abdominal tumor. |
| ~ granuloma | a tumor composed of granulation tissue resulting from injury or inflammation or infection. |
| ~ adipose tumor, lipoma | a tumor consisting of fatty tissue. |
| ~ malignant neoplasm, malignant tumor, metastatic tumor | a tumor that is malignant and tends to spread to other parts of the body. |
| ~ meningioma | a tumor arising in the meninges which surround the brain and spinal cord; usually slow growing and sometimes malignant. |
| ~ neurilemoma, neurofibroma | tumor of the fibrous covering of a peripheral nerve. |
| ~ neuroma | any tumor derived from cells of the nervous system. |
| ~ phaeochromocytoma, pheochromocytoma | a vascular tumor of the adrenal gland; hypersecretion of epinephrine results in intermittent or sustained hypertension. |
| ~ pinealoma | tumor of the pineal gland. |
| ~ plasmacytoma | neoplasm of plasma cells (usually in bone marrow). |
| ~ psammoma, sand tumor | a tumor derived from fibrous tissue of the meninges or choroid plexus or certain other structures associated with the brain; characterized by sandlike particles. |
| ~ teratoma | a tumor consisting of a mixture of tissues not normally found at that site. |
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