| blastocytoma | (noun) a tumor composed of immature undifferentiated cells | Synonyms: blastoma, embryonal carcinosarcoma |
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| blastoma | (noun) a tumor composed of immature undifferentiated cells | Synonyms: blastocytoma, embryonal carcinosarcoma |
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| cephalhematoma | (noun) a collection of blood under the scalp of a newborn; caused by pressure during birth | Synonyms: cephalohematoma |
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| cephalohematoma | (noun) a collection of blood under the scalp of a newborn; caused by pressure during birth | Synonyms: cephalhematoma |
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| glioblastoma | (noun) a fast-growing malignant brain tumor composed of spongioblasts; nearly always fatal | Synonyms: spongioblastoma |
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| haematoma | (noun) a localized swelling filled with blood | Synonyms: hematoma |
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| hamartoma | (noun) a focal growth that resembles a neoplasm but results from faulty development in an organ | - |
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| hematoma | (noun) a localized swelling filled with blood | Synonyms: haematoma |
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| hepatoma | (noun) carcinoma of the liver | Synonyms: hepatocarcinoma, hepatocellular carcinoma, malignant hepatoma |
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| nephroblastoma | (noun) malignant renal tumor of young children characterized by hypertension and blood in the urine and the presence of a palpable mass | Synonyms: adenomyosarcoma, embryoma of the kidney, Wilms' tumor, Wilms tumour |
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| neuroblastoma | (noun) malignant tumor containing embryonic nerve cells; usually metastasizes quickly | - |
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| osteoblastoma | (noun) benign tumor of bone and fibrous tissue; occurs in the vertebrae or femur or tibia or arm bones (especially in young adults) | - |
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| phaeochromocytoma | (noun) a vascular tumor of the adrenal gland; hypersecretion of epinephrine results in intermittent or sustained hypertension | Synonyms: pheochromocytoma |
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| pheochromocytoma | (noun) a vascular tumor of the adrenal gland; hypersecretion of epinephrine results in intermittent or sustained hypertension | Synonyms: phaeochromocytoma |
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| plasmacytoma | (noun) neoplasm of plasma cells (usually in bone marrow) | - |
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| retinoblastoma | (noun) malignant ocular tumor of retinal cells; usually occurs before the third year of life; composed of primitive small round retinal cells | - |
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| scotoma | (noun) an isolated area of diminished vision within the visual field | - |
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| spongioblastoma | (noun) a fast-growing malignant brain tumor composed of spongioblasts; nearly always fatal | Synonyms: glioblastoma |
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| steatocystoma | (noun) a common cyst of the skin; filled with fatty matter (sebum) that is secreted by a sebaceous gland that has been blocked | Synonyms: pilar cyst, sebaceous cyst, wen |
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| stoma | (noun) a mouth or mouthlike opening (especially one created by surgery on the surface of the body to create an opening to an internal organ) | - |
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| (noun) a minute epidermal pore in a leaf or stem through which gases and water vapor can pass | Synonyms: pore, stomate |
| teratoma | (noun) a tumor consisting of a mixture of tissues not normally found at that site | - |
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| tritoma | (noun) a plant of the genus Kniphofia having long grasslike leaves and tall scapes of red or yellow drooping flowers | Synonyms: flame-flower, flame flower, flameflower, kniphofia |
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