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Adrenal Cortex Neoplasms definition: Tumors or cancers of the ADRENAL CORTEX.
Adrenal Cortex Neoplasm definition: A benign or malignant (primary or metastatic) neoplasm affecting the adrenal cortex. (NCI05)
Adrenal Gland Neoplasms definition: Tumors or cancer of the ADRENAL GLANDS.
adrenal neoplasm definition: new abnormal adrenal gland tissue that grows by excessive cellular division and proliferation more rapidly than normal and continues to grow after the stimuli that initiated the new growth cease.
Adrenal Gland Neoplasm definition: A benign or malignant (primary or metastatic) neoplasm affecting the adrenal glands. (NCI05)
Anus Neoplasms definition: Tumors or cancer of the ANAL CANAL.
Anal Neoplasm definition: A benign or malignant neoplasm involving the anus.
Appendiceal Neoplasms definition: Tumors or cancer of the APPENDIX.
Appendix Neoplasm definition: A benign or malignant neoplasm involving the appendix.
Astrocytoma definition: Neoplasms of the brain and spinal cord derived from glial cells which vary from histologically benign forms to highly anaplastic and malignant tumors. Fibrillary astrocytomas are the most common type and may be classified in order of increasing malignancy (grades I through IV). In the first two decades of life, astrocytomas tend to originate in the cerebellar hemispheres; in adults, they most frequently arise in the cerebrum and frequently undergo malignant transformation. (From Devita et al., Cancer: Principles and Practice of Oncology, 5th ed, pp2013-7; Holland et al., Cancer Medicine, 3d ed, p1082)
astrocytoma definition: neoplasms composed of astrocytes of the brain and spinal cord derived from glial cells which vary from histologically benign forms to highly anaplastic and malignant tumors.
Astrocytoma definition: A tumor of the brain or spinal cord showing astrocytic differentiation. It includes the following clinicopathological entities: pilocytic astrocytoma, diffuse astrocytoma, anaplastic astrocytoma, pleomorphic xanthoastrocytoma, and subependymal giant cell astrocytoma.
astrocytoma definition: (as-troe-sye-TOE-ma) A tumor that begins in the brain or spinal cord in small, star-shaped cells called astrocytes.
Astrocytic Tumor definition: A glial tumor of the brain or spinal cord showing astrocytic differentiation. It includes the following clinicopathological entities: pilocytic astrocytoma, diffuse astrocytoma, anaplastic astrocytoma, pleomorphic xanthoastrocytoma, subependymal giant cell astrocytoma, and glioblastoma.
Biliary Tract Neoplasms definition: Tumors or cancer in the BILIARY TRACT including the BILE DUCTS and the GALLBLADDER.
biliary tract neoplasm definition: new abnormal biliary tract tissue that grows by excessive cellular division and proliferation more rapidly than normal and continues to grow after the stimuli that initiated the new growth cease; includes neoplasms of the bile ducts and the gallbladder.
Biliary Tract Neoplasm definition: Benign and malignant neoplasms which form in the biliary tree, which includes the bile ducts and gall bladder. - 2003
bladder neoplasm definition: new abnormal urinary bladder tissue that grows by excessive cellular division and proliferation more rapidly than normal and continues to grow after the stimuli that initiated the new growth cease.
Urinary Bladder Neoplasms definition: Tumors or cancer of the URINARY BLADDER.
Bladder Neoplasm definition: A benign or malignant, primary or metastatic neoplasm of the bladder. - 2003
Bone Neoplasms definition: Tumors or cancer located in bone tissue or specific BONES.
bone neoplasm definition: new abnormal bone tissue that grows by excessive cellular division and proliferation more rapidly than normal and continues to grow after the stimuli that initiated the new growth cease; includes tumors or cancer located in bone tissue or specific bones.
Bone Neoplasm definition: A benign or malignant (primary or metastatic) tumor involving the bone. Common malignant tumor types involving the bones are metastatic carcinomas and sarcomas. -- 2003
Brain Neoplasms definition: Neoplasms of the intracranial components of the central nervous system, including the cerebral hemispheres, basal ganglia, hypothalamus, thalamus, brain stem, and cerebellum. Brain neoplasms are subdivided into primary (originating from brain tissue) and secondary (i.e., metastatic) forms. Primary neoplasms are subdivided into benign and malignant forms. In general, brain tumors may also be classified by age of onset, histologic type, or presenting location in the brain.
brain neoplasm definition: neoplasms of the intracranial components of the central nervous system, including the cerebral hemispheres, basal ganglia, hypothalamus, thalamus, brain stem, and cerebellum; subdivided into primary (originating from brain tissue) and secondary (metastatic) forms; primary neoplasms are subdivided into benign and malignant forms; brain tumors may also be classified by age of onset, histologic type, or presenting location in the brain.
Brain Neoplasm definition: Benign and malignant neoplasms that arise from or metastasize to structures within the cranium. This includes meningeal and other tumors that occur in the spaces that surround the brain, and neoplasms of the brain.
Brenner Tumor definition: A smooth, solid or cystic fibroepithelial (FIBROEPITHELIAL NEOPLASMS) tumor, usually found in the OVARIES but can also be found in the adnexal region and the KIDNEYS. It consists of a fibrous stroma with nests of epithelial cells that sometimes resemble the transitional cells lining the urinary bladder. Brenner tumors generally are benign and asymptomatic. Malignant Brenner tumors have been reported.
Brenner Tumor definition: A usually benign tumor composed of solid and cystic nests of epithelial cells resembling transitional epithelium; it is surrounded by an abundant stromal component that is dense and fibroblastic in nature.
Ovarian Brenner Tumor definition: A benign, borderline, or malignant transitional cell neoplasm arising from the ovary. It constitutes between 1% and 2% of all ovarian neoplasms. The average age at presentation is about 50 years. Grossly it is usually unilateral, firm and white or yellowish. Microscopically it consists of solid and cystic nests of epithelial cells resembling transitional epithelium surrounded by an abundant stromal component of dense, fibroblastic nature.
Burkitt Lymphoma definition: A form of undifferentiated malignant LYMPHOMA usually found in central Africa, but also reported in other parts of the world. It is commonly manifested as a large osteolytic lesion in the jaw or as an abdominal mass. B-cell antigens are expressed on the immature cells that make up the tumor in virtually all cases of Burkitt lymphoma. The Epstein-Barr virus (HERPESVIRUS 4, HUMAN) has been isolated from Burkitt lymphoma cases in Africa and it is implicated as the causative agent in these cases; however, most non-African cases are EBV-negative.
Burkitt's lymphoma definition: form of undifferentiated malignant lymphoma usually found in central Africa, but also reported in other parts of the world; commonly manifested as a large osteolytic lesion in the jaw or as an abdominal mass; B-cell antigens are expressed on the immature cells that make up the tumor in virtually all cases of Burkitt lymphoma; the Epstein-Barr virus (human herpesvirus 4) has been isolated from Burkitt lymphoma cases in Africa and it is implicated as the causative agent in these cases, however, most non-African cases are EBV-negative.
Burkitt's lymphoma definition: A type of non-Hodgkin's lymphoma that most often occurs in young people aged 12-30 years. The disease usually causes a rapidly growing tumor in the abdomen.
Burkitt's leukemia definition: A rare, fast-growing cancer of the blood. Also called B-cell acute lymphocytic leukemia or B-cell acute lymphoblastic leukemia.
Burkitt Lymphoma definition: A highly aggressive lymphoma composed of monomorphic medium-sized B-cells with basophilic cytoplasm and numerous mitotic figures. It is often associated with the presence of Epstein-Barr virus (EBV) and is commonly seen in AIDS patients. Three morphologic variants are recognized: classical Burkitt lymphoma, Burkitt lymphoma with plasmacytoid differentiation, and atypical Burkitt/Burkitt-like lymphoma. All cases express the MYC translocation [t(8;14)]. (WHO, 2001)
Burkitt Leukemia definition: The leukemic counterpart of Burkitt's lymphoma. The characteristic Burkitt cells are seen in the bone marrow and the peripheral blood. This is an aggressive leukemia.
Carcinoid Tumor definition: A usually small, slow-growing neoplasm composed of islands of rounded, oxyphilic, or spindle-shaped cells of medium size, with moderately small vesicular nuclei, and covered by intact mucosa with a yellow cut surface. The tumor can occur anywhere in the gastrointestinal tract (and in the lungs and other sites); approximately 90% arise in the appendix. It is now established that these tumors are of neuroendocrine origin and derive from a primitive stem cell. (From Stedman, 25th ed & Holland et al., Cancer Medicine, 3d ed, p1182)
carcinoid definition: (KAR-sin-oyd) A type of tumor usually found in the gastrointestinal system (most often in the appendix), and sometimes in the lungs or other sites. Carcinoid tumors are usually benign.
Carcinoid Tumor definition: A slow growing neuroendocrine tumor, composed of uniform, round, or polygonal cells having monotonous, centrally located nuclei and small nucleoli, infrequent mitoses, and no necrosis. The tumor may show a variety of patterns, such as solid, trabecular, and acinar. Electron microscopy shows small secretory granules. Immunohistochemical studies reveal NSE, as well as chromogranin immunoreactivity. Malignant histology (cellular pleomorphism, hyperchromatic nuclei, prominent nucleoli, necrosis, and mitoses) can occasionally be seen. Such cases may have an aggressive clinical course. Gastrointestinal tract and lung are common sites of involvement.
Carcinoma, Ehrlich Tumor definition: A transplantable, poorly differentiated malignant tumor which appeared originally as a spontaneous breast carcinoma in a mouse. It grows in both solid and ascitic forms.
Ehrlich's tumor definition: experimental neoplasm that is transplantable, poorly differentiated and malignant; appeared originally as a spontaneous breast carcinoma in a mouse; grows in both solid and ascitic forms.
Cecal Neoplasms definition: Tumors or cancer of the CECUM.
Cerebellar Neoplasms definition: Primary or metastatic neoplasms of the CEREBELLUM. Tumors in this location frequently present with ATAXIA or signs of INTRACRANIAL HYPERTENSION due to obstruction of the fourth ventricle. Common primary cerebellar tumors include fibrillary ASTROCYTOMA and cerebellar HEMANGIOBLASTOMA. The cerebellum is a relatively common site for tumor metastases from the lung, breast, and other distant organs. (From Okazaki & Scheithauer, Atlas of Neuropathology, 1988, p86 and p141)
Cerebellar Neoplasm definition: A benign or malignant (primary or metastatic) tumor involving the cerebellum. -- 2003
cervix neoplasm definition: new abnormal cervical tissue that grows by excessive cellular division and proliferation more rapidly than normal and continues to grow after the stimuli that initiated the new growth cease.
Cervical Neoplasm definition: Abnormal growth in the cervix, which can be benign (non cancerous) or malignant (cancerous )
Uterine Cervical Neoplasms definition: Tumors or cancer of the UTERINE CERVIX.
Choroid Neoplasms definition: Tumors of the choroid; most common intraocular tumors are malignant melanomas of the choroid. These usually occur after puberty and increase in incidence with advancing age. Most malignant melanomas of the uveal tract develop from benign melanomas (nevi).
Colonic Neoplasms definition: Tumors or cancer of the COLON.
colon neoplasm definition: tumors or cancer of the colon, which is part of the large intestine from the cecum to the rectum.
Colon Neoplasm definition: A benign or malignant tumor involving the colon. -- 2003
Colorectal Neoplasms definition: Tumors or cancer of the COLON or the RECTUM or both. Risk factors for colorectal cancer include chronic ULCERATIVE COLITIS; FAMILIAL POLYPOSIS COLI; exposure to ASBESTOS; and irradiation of the CERVIX UTERI.
colorectal neoplasm definition: general term to describe a wide variety of lesions found in the colon or rectum, from fungating tumors to small, malignant foci in the head of a pedunculated polyp.
Colorectal Neoplasm definition: Benign or malignant abnormal growth in the colon or rectum.
Conjunctival Neoplasms definition: Tumors or cancer of the CONJUNCTIVA.
Vipoma definition: A tumor that secretes VASOACTIVE INTESTINAL PEPTIDE, a neuropeptide that causes VASODILATION; relaxation of smooth muscles; watery DIARRHEA; HYPOKALEMIA; and HYPOCHLORHYDRIA. Vipomas, derived from the pancreatic ISLET CELLS, generally are malignant and can secrete other hormones. In most cases, Vipomas are located in the PANCREAS but can be found in extrapancreatic sites.
VIP Producing Tumor definition: An often clinically aggressive endocrine neoplasm located in the pancreas or small intestine. It is composed of cells containing vasoactive intestinal peptide. It may cause intractable diarrhea and metabolic disturbances.
Duodenal Neoplasms definition: Tumors or cancer of the DUODENUM.
Ear Neoplasms definition: Tumors or cancer of any part of the hearing and equilibrium system of the body (the EXTERNAL EAR, the MIDDLE EAR, and the INNER EAR).
ear neoplasm definition: new abnormal ear tissue or cells that grow by excessive cellular division and proliferation more rapidly than normal and continues to grow after the stimuli that initiated the new growth cease; includes internal, external, or middle ear neoplasms.
Tumor Embolism definition: A tumor embolism involves sudden blockage of an artery by a clot or by other material from tumor fragments transported by the blood stream.
Endocrine Gland Neoplasms definition: Tumors or cancer of the ENDOCRINE GLANDS.
endocrine neoplasm definition: new abnormal endocrine gland tissue that grows by excessive cellular division and proliferation more rapidly than normal and continues to grow after the stimuli that initiated the new growth cease.
Endocrine Neoplasm definition: A benign or malignant neoplasm arising from the epithelial cells of an endocrine organ. --2003
Endometrial Neoplasms definition: Tumors or cancer of ENDOMETRIUM, the mucous lining of the UTERUS. These neoplasms can be benign or malignant. Their classification and grading are based on the various cell types and the percent of undifferentiated cells.
Endometrial Neoplasm definition: Tumor originating and limited to the endometrium at first stage
Epidural Neoplasms definition: Neoplasms located in the space between the vertebral PERIOSTEUM and DURA MATER surrounding the SPINAL CORD. Tumors in this location are most often metastatic in origin and may cause neurologic deficits by mass effect on the spinal cord or nerve roots or by interfering with blood supply to the spinal cord.
Esophageal Neoplasms definition: Tumors or cancer of the ESOPHAGUS.
esophagus neoplasm definition: new abnormal esophageal tissue, the portion of the digestive canal between the pharynx and stomach, that grows by excessive cellular division and proliferation more rapidly than normal and continues to grow after the stimuli that initiated the new growth cease.
Esophageal Neoplasm definition: A benign or malignant neoplasm involving the esophagus.
Eye Neoplasms definition: Tumors or cancer of the EYE.
eye neoplasm definition: new abnormal eye tissue that grows by excessive cellular division and proliferation more rapidly than normal and continues to grow after the stimuli that initiated the new growth cease; for the external lid of the eye use EYELID NEOPLASM.
Eye Neoplasm definition: A benign or malignant neoplasm affecting the structures of the eye.
Gastrointestinal Neoplasms definition: Tumors or cancer of the GASTROINTESTINAL TRACT, from the MOUTH to the ANAL CANAL.
gastrointestinal neoplasm definition: new abnormal gastrointestinal tissue that grows by excessive cellular division and proliferation more rapidly than normal and continues to grow after the stimuli that initiated the new growth cease; use for general gastrointestinal tract neoplasms.
Gastrointestinal Neoplasm definition: A benign or malignant neoplasm involving any part of the gastrointestinal system.
Giant Lymph Node Hyperplasia definition: Large benign, hyperplastic lymph nodes. The more common hyaline vascular subtype is characterized by small hyaline vascular follicles and interfollicular capillary proliferations. Plasma cells are often present and represent another subtype with the plasma cells containing IgM and IMMUNOGLOBULIN A.
Castleman's disease definition: A rare disorder in which noncancerous growths develop in lymph node tissue.
Heart Neoplasms definition: Tumors in any part of the heart. They include primary cardiac tumors and metastatic tumors to the heart. Their interference with normal cardiac functions can cause a wide variety of symptoms including HEART FAILURE; CARDIAC ARRHYTHMIAS; or EMBOLISM.
Cardiac Neoplasm definition: A benign or malignant, primary or metastatic neoplasm affecting the heart.
Hydatidiform Mole definition: Trophoblastic hyperplasia associated with normal gestation, or molar pregnancy. It is characterized by the swelling of the CHORIONIC VILLI and elevated human CHORIONIC GONADOTROPIN. Hydatidiform moles or molar pregnancy may be categorized as complete or partial based on their gross morphology, histopathology, and karyotype.
hydatidiform mole definition: trophoblastic hyperplasia associated with normal gestation, or molar pregnancy; characterized by the swelling of the chorionic villi and elevated human chorionic gonadotropin; hydatidiform moles or molar pregnancy may be categorized as complete or partial based on their gross morphology, histopathology, and karyotype.
molar pregnancy definition: A rare cancer in women of childbearing age in which cancer cells grow in the tissues that are formed in the uterus after conception. Also called gestational trophoblastic disease, gestational trophoblastic neoplasia, gestational trophoblastic tumor, or choriocarcinoma.
Hydatidiform Mole definition: A gestational disorder characterized by an abnormal placenta with marked enlargement of the chorionic villi and hyperplasia of the villous trophoblastic cells. According to the amount of villous involvement, a hydatidiform mole is defined as complete or partial. Most molar pregnancies are complete and are characterized by generalized hydropic villous changes. Partial moles are characterized by a mixture of large hydropic villi and normal placenta tissue. Complete moles are usually diploid and typically present between the eleventh and twenty-fifth week of pregnancy, whereas partial moles are usually triploid and usually present around the nineteenth week of pregnancy. The incidence of choriocarcinoma is higher in patients with complete hydatidiform mole. When a hydatidiform mole invades the myometrium and broad ligament, or it is found in distant sites as vagina, vulva, and lung, it is referred as invasive mole.
Neoplasms definition: New abnormal growth of tissue. Malignant neoplasms show a greater degree of anaplasia and have the properties of invasion and metastasis, compared to benign neoplasms.
tumor definition: (TOO-mer) An abnormal mass of tissue that results from excessive cell division. Tumors perform no useful body function. They may be benign (not cancerous) or malignant (cancerous).
tumor definition: (NEE-o-PLAY-zha) Abnormal and uncontrolled cell growth.
tumor definition: A new growth of benign or malignant tissue.
NEOPLASMS BENIGN, MALIGNANT AND UNSPECIFIED (INCL CYSTS AND POLYPS) definition: An abnormal tissue growth resulted from uncontrolled cell proliferation. Benign neoplastic cells resemble normal cells without exhibiting significant cytologic atypia, while malignant ones exhibit overt signs such as dysplastic features, atypical mitotic figures, necrosis, nuclear pleomorphism, and anaplasia. Representative examples of benign neoplasms include papillomas, cystadenomas, and lipomas; malignant neoplasms include carcinomas, sarcomas, lymphomas, and leukemias. -- 2004 (NCI)
neoplastic growth definition: growth of the tumor after morphology of cell has changed; cells may or may not have transformed to a cancerous state.
Neoplasm definition: An abnormal tissue growth resulted from uncontrolled cell proliferation.
embryo neoplasm definition: new abnormal embryonic tissue that grows by excessive cellular division and proliferation more rapidly than normal and continues to grow after the stimuli that initiated the new growth cease.
Embryonal Neoplasm definition: A usually malignant neoplasm composed of primitive (immature) tissues that resemble fetal tissues. Medulloblastoma, Ependymoblastoma, Pineoblastoma, and Wilms tumor are representative embryonal neoplasms. --2003
Neoplasms, Experimental definition: Experimentally induced new abnormal growth of TISSUES in animals to provide models for studying human neoplasms.
Experimental Tumor definition: Laboratory tumor models used to study tumor development and treatment.
tumor antigen definition: proteins, glycoproteins or lipoprotein moieties on surfaces of tumor cells that are usually identified by monoclonal antibodies.
tumor-specific antigen definition: A protein or other molecule that is unique to cancer cells or is much more abundant in them. These molecules are usually found in the plasma (outer) membrane, and they are thought to be potential targets for immunotherapy or other types of anticancer treatment.
Tumor Antigen definition: 1. antigens that may be frequently associated with tumors or may be specifically found on tumor cells of the same origin (tumor specific); 2. tumor antigens may also be associated with replication and transformation by certain DNA tumor viruses, including adenoviruses and papovaviruses. Neoantigens. Any immunologically detectable marker whose presence or amount indicates the presence of a tumor.
Fibromatosis, Aggressive definition: A childhood counterpart of abdominal or extra-abdominal desmoid tumors, characterized by firm subcutaneous nodules that grow rapidly in any part of the body but do not metastasize. The adult form of abdominal fibromatosis is FIBROMATOSIS, ABDOMINAL. (Stedman, 25th ed)
desmoid tumor definition: A tumor of the tissue that surrounds muscles, usually in the abdomen. A desmoid tumor rarely metastasizes (spreads to other parts of the body). Also called aggressive fibromatosis, especially when the tumor is outside the abdomen.
Deep Fibromatosis/Desmoid Tumor definition: An insidious poorly circumscribed neoplasm arising from the deep soft tissues. It is characterized by the presence of elongated spindle-shaped fibroblasts, collagenous stroma formation, and an infiltrative growth pattern.
Central Nervous System Neoplasms definition: Benign and malignant neoplastic processes that arise from or secondarily involve the brain, spinal cord, or meninges.
CNS tumors definition: Tumors of the central nervous system, including brain stem glioma, craniopharyngioma, medulloblastoma, and meningioma.
central nervous system neoplasm definition: new abnormal central nervous system tissue that grows by excessive cellular division and proliferation more rapidly than normal and continues to grow after the stimuli that initiated the new growth cease; neoplastic processes that arise from or secondarily involve the brain, spinal cord, or meninges.
Central Nervous System Neoplasm definition: Abnormal growth of cells that comprise the tissues of the central nervous system (brain and spinal cord), without designation of benign or malignant nature.
benign tumor definition: (beh-NINE) A noncancerous growth that does not invade nearby tissue or spread to other parts of the body.
Benign Neoplasm definition: A neoplasm which is characterized by the absence of morphologic features associated with malignancy (severe cytologic atypia, tumor cell necrosis, and high mitotic rate). Benign neoplasms remain confined to the original site of growth and only rarely metastasize to other anatomic sites.
Adenomatoid Tumor definition: A small, circumscribed, benign tumor of the genital tract, composed of small glandlike spaces lined by flattened or cuboidal mesothelium-like cells. (From Dorland, 27th ed)
Adenomatoid Tumor definition: A benign neoplasm arising from mesothelial cells. It is characterized by the formation of glandular and tubular patterns. It can occur in several anatomic sites including the pleura, peritoneum, and epididymis.
Combined Carcinoid and Adenocarcinoma definition: A malignant epithelial neoplasm composed of a mixture of neuroendocrine cells with morphologic and immunohistochemical characteristics of carcinoid tumor and malignant glandular cells.
Sympathetic Paraganglioma definition: A benign or malignant paraganglioma arising from the chromaffin cells of the paraganglia that are located along the sympathetic nerves. It includes extra-adrenal paragangliomas and paragangliomas that arise from the adrenal medulla. The latter are commonly referred to as pheochromocytomas. Representative examples of extra-adrenal sympathetic paragangliomas include the bladder, and superior and inferior paraaortic paragangliomas. Clinical signs are related to the secretion of catecholamines resulting in hypertension.
Pigmented Dermatofibrosarcoma Protuberans (Bednar Tumor) definition: A morphologic variant of dermatofibrosarcoma protuberans characterized by the presence of melanin-pigmented dendritic cells.
Ampulla of Vater Neoplasm definition: A benign or malignant neoplasm involving the ampulla of Vater.
Papillary Intralymphatic Angioendothelioma definition: An intermediate, rarely metastasizing blood vessel neoplasm. It is characterized by the presence of lymphatic-like vascular channels and papillary endothelial proliferation.
Trichoblastoma definition: A benign hair follicle neoplasm with trichoblastic differentiation. It usually presents as a solitary papular lesion It most often presents on the head and neck area, but it may develop in any anatomic site containing hair follicles. Because of its benign nature, treatment usually is not required, provided that the diagnosis has been established with certainty.
cartilage neoplasm definition: new abnormal cartilage that grows by excessive cellular division and proliferation more rapidly than normal and continues to grow after the stimuli that initiated the new growth cease.
Chondrogenic Neoplasm definition: A benign or malignant neoplasm arising from soft tissue and bone. It is characterized by the presence of chondrocytes. Benign lesions are usually asymptomatic and discovered as incidental findings. Malignant lesions are usually painful.
cardiovascular neoplasm definition: new abnormal cardiovascular tissue that grows by excessive cellular division and proliferation more rapidly than normal and continues to grow after the stimuli that initiated the new growth cease.
Cardiovascular Neoplasm definition: A neoplasm of the heart and/or blood vessels without specification as to whether it is benign or malignant.
Benign Nervous System Neoplasm definition: Abnormal growth of cells in the nervous system without evidence of malignant characteristics. Unlike other organ systems, tumors in the central nervous system can have benign histological characteristics but still have life threatening effects due to their location within the neuraxis (e.g., brainstem gliomas).
Sarcoma, Ewing's definition: A malignant tumor of the bone which always arises in the medullary tissue, occurring more often in cylindrical bones. There are conspicuous foci of necrosis in association with irregular masses of small, regular, rounded or ovoid cells with very scanty cytoplasm. The tumor occurs usually before the age of 20, about twice as frequently in males as in females. (From Dorland, 27th ed; Stedman, 25th ed)
Ewing's tumor definition: malignant tumor of bones which always arises in medullary tissue, occurring more often in cylindrical bones, with pain, fever, and leukocytosis.
Ewing Sarcoma definition: A small round cell tumor that lacks morphologic, immunohistochemical, and electron microscopic evidence of neuroectodermal differentiation. It represents one of the two ends of the spectrum called Ewing's sarcoma/peripheral neuroectodermal tumor. It affects mostly males under age 20, and it can occur in soft tissue or bone. Pain and the presence of a mass are the most common clinical symptoms.
Ewing Sarcoma/Peripheral Primitive Neuroectodermal Tumor definition: A spectrum of malignant tumors, affecting mostly males under age 20, characterized morphologically by the presence of small round cells. Ewing sarcoma and peripheral primitive neuroectodermal tumor represent the ends of a spectrum, with Ewing sarcoma lacking evidence of neural differentiation and the markers that characterize the peripheral primitive neuroectodermal tumor. Ewing sarcoma and peripheral primitive neuroectodermal tumor may share cytogenetic abnormalities, proto-oncogene expression, cell culture and immunohistochemical abnormalities. These tumors may occur in the soft tissues or the bones. Pain and the presence of a mass are the most common clinical symptoms.
brain stem tumor definition: A tumor in the part of the brain that connects to the spinal cord (the brain stem).
Brain Stem Neoplasms definition: Benign and malignant intra-axial tumors of the MESENCEPHALON; PONS; or MEDULLA OBLONGATA of the BRAIN STEM. Primary and metastatic neoplasms may occur in this location. Clinical features include ATAXIA, cranial neuropathies (see CRANIAL NERVE DISEASES), NAUSEA, hemiparesis (see HEMIPLEGIA), and quadriparesis. Primary brain stem neoplasms are more frequent in children. Histologic subtypes include GLIOMA; HEMANGIOBLASTOMA; GANGLIOGLIOMA; and EPENDYMOMA.
Brain Stem Neoplasm definition: Abnormal growth of cells in the brain stem. It is important to note that even if the cells comprising this tumor are histologically benign, the prognosis can be grim due to the tumor's location. Overall, though some of these tumors have a slightly better prognosis (patients with dorsally exophytic tumors fare slightly better) the 5-ear survival is less than forty percent. Intraaxial brain stem neoplasms can be associated with neuro-ophthalmologic signs that can assist in localization even prior to definitive imaging.
Askin Tumor definition: A primitive neuroectodermal tumor (small round blue cell tumor) of the thorax which can involve the periosteum, thoracic wall and/or pleura though it spares the lung parenchyma.
ependymal tumors definition: A type of brain tumor that usually begins in the central canal of the spinal cord. Ependymal tumors may also develop in the cells lining the ventricles of the brain, which produce and store the special fluid (cerebrospinal fluid) that protects the brain and spinal cord. Also called ependymomas.
Ependymal Tumor definition: Ependymal Tumors make up a group of neoplasms which arise from the ependymal lining of the cerebral ventricles and from the remnants of the central canal of the spinal cord. Ependymal tumors occur predominantly in children and young adults with varied morphological features and biological behavior. There are 4 types: ependymoma, anaplastic ependymoma, myxopapillary ependymoma and subependymoma.
epithelioma definition: neoplasm of epithelial origin, ranging from benign (adenoma and papilloma) to malignant (carcinoma).
Childhood Neoplasm definition: A benign or malignant neoplasm arising during childhood.
tumor burden definition: Refers to the number of cancer cells, the size of a tumor, or the amount of cancer in the body. Also called tumor load.
Tumor Burden definition: The total amount (cell number, weight, size or volume) of tumor cells or tissue in the body.
Breast Neoplasms definition: Tumors or cancer of the human BREAST.
breast neoplasm definition: new abnormal mammary tissue that grows by excessive cellular division and proliferation more rapidly than normal and continues to grow after the stimuli that initiated the new growth cease.
Breast Neoplasm definition: A benign or malignant neoplasm of the breast parenchyma. It can originate from the ducts, lobules or the breast adipose tissue. Breast neoplasms are much more common in females than males. -- 2003
tumor definition: .
 
 
deGerman
Geschwulst definition: [1] laienhaft für eine Schwellung des Gewebes
Tumor definition: [1] Medizin: Wucherung [2] Medizin, seltener allgemeiner: Schwellung (unklarer Ursache)
Gewächs definition: [1] synonym für: eine Pflanze[1,2] [2] synonym für: Wein[1-3] [3] Medizin: eine Geschwulst, eine Schwellung des Gewebes
Chondroblastom definition: Chondroblastome, tumeur de Codman.
Tumor definition: Tumeur.
 
ptPortuguese
apostema definition: Abcès.
tumor definition: Tumeur.
 
nlDutch
tumor definition: Tumeur.
 
laLatin
tumor definition: Tumeur.
tumor definition: boursouflage, boursouflure.
tumor definition: enflure.
 
frFrench
tumeur definition: Éminence, grosseur plus ou moins considérable, développée dans quelque partie du corps, soit par une maladie, soit par une autre cause.
boursouflage definition: Action de boursoufler.
 
trTurkish
tümör definition: Tumeur.