tumor /tu·mor/ (too´mer)
Tumor
tumor (T)
tumor,
tumor
Patient discussion about hormonal tumor.
1. swelling, one of the cardinal signs of inflammation; morbid enlargement.
2. neoplasm; a new growth of tissue in which cell multiplication is uncontrolled and progressive.
adenomatoid odontogenic tumor a benign odontogenic tumor with ductlike or glandlike arrangements of columnar epithelial cells, usually occurring in the anterior jaw region.
Askin's tumor a malignant small-cell tumor of soft tissue in the thoracopulmonary region in children; one of the peripheral neuroectodermal tumors.
benign tumor one lacking the properties of invasion and metastasis and showing a lesser degree of anaplasia than do malignant tumors; it is usually surrounded by a fibrous capsule.
Brenner tumor a rare, usually benign, tumor of the ovary characterized by groups of epithelial cells lying in a fibrous connective tissue stroma.
brown tumor a giant-cell granuloma produced in and replacing bone, occurring in osteitis fibrosa cystica and due to hyperparathyroidism.
Buschke-Löwenstein tumor a large, destructive, penetrating, cauliflower-like mass on the prepuce, especially in uncircumcised males, and also in the perianal region.
carcinoid tumor carcinoid.
carcinoma ex mixed tumor carcinoma ex pleomorphic adenoma.
carotid body tumor a chemodectoma of the carotid body, a firm, round mass at the bifurcation of the common carotid artery.
dermal duct tumor a small, intradermal, papular, eccrine lesion occurring on the head and neck in older adults.
desmoid tumor an unencapsulated locally invasive fibromatous tumor arising in the musculoaponeurotic tissue, usually the abdominal wall, and often resembling fibrosarcoma.
diarrheogenic tumor VIPoma.
endodermal sinus tumor yolk sac t.
erectile tumor cavernous hemangioma.
Ewing's tumor see under sarcoma.
false tumor structural enlargement due to extravasation, exudation, echinococcus, or retained sebaceous matter.
feminizing tumor a functional tumor that produces feminization in boys and men or precocious sexual development in girls, e.g., germinoma.
fibrohistiocytic tumor a tumor containing cells resembling histiocytes and others resembling fibroblasts; often used to denote the most general meaning of benign or malignant fibrous histiocytoma.
functional tumor , functioning tumor a hormone-secreting tumor in an endocrine gland.
germ cell tumor any of a group of tumors arising from primitive germ cells, usually of the testis or ovary.
giant cell tumor
1. a bone tumor, ranging from benign to frankly malignant, composed of cellular spindle cell stroma containing multinucleated giant cells resembling osteoclasts.
2. a benign, small, yellow, tumor-like nodule of tendon sheath origin, most often of the wrist and fingers or ankle and toes, laden with lipophages and containing multinucleated giant cells.
glomus tumor
1. a benign, blue-red, painful tumor involving a glomeriform arteriovenous anastomosis (glomus body).
2. chemodectoma.
glomus jugulare tumor a chemodectoma involving the tympanic body (glomus jugulare).
granular cell tumor a usually benign, circumscribed, tumor-like lesion of soft tissue, particularly of the tongue, composed of large cells with prominent granular cytoplasm; the histiogenesis is uncertain, but Schwann cell derivation is favored.
granulosa tumor , granulosa cell tumor an ovarian tumor originating in the cells of the membrana granulosa.
granulosa-theca cell tumor an ovarian tumor composed of granulosa (follicular) cells and theca cells; either form may predominate.
heterologous tumor , heterotypic tumor one made up of tissue differing from that in which it grows.
hilar cell tumor a rare benign neoplasm of the hilus of the ovary, histologically resembling Leydig cell tumor of the testis.
homologous tumor one resembling the surrounding parts in its structure.
Hürthle cell tumor new growth of the thyroid gland composed predominantly of Hürthle cells; it is usually benign (Hürthle cell adenoma) but may be locally invasive or metastasize (Hürthle cell carcinoma or malignant Hürthle cell tumor).
islet cell tumor a tumor of the pancreatic islets; many secrete excessive amounts of hormones. Types include gastrinoma, glucagonoma, insulinoma, somatostatinoma, and VIPoma.
Krukenberg's tumor carcinoma of the ovary, usually metastatic from gastrointestinal cancer, marked by areas of mucoid degeneration and by the presence of signet-ring–like cells.
Leydig cell tumor
1. a usually benign, nongerminal tumor of the Leydig cells of the testis.
lipoid cell tumor of ovary a usually benign ovarian tumor composed of eosinophilic cells or cells with lipoid vacuoles; it causes masculinization.
malignant tumor one having the properties of invasion and metastasis and showing a high degree of anaplasia.
mast cell tumor mastocytosis.
melanotic neuroectodermal tumor a benign, rapidly growing, dark tumor of the jaw and occasionally of other sites; seen almost exclusively in infants.
mixed tumor a tumor composed of more than one type of neoplastic tissue.
müllerian mixed tumor a malignant mixed tumor of the uterus containing both endometrial adenocarcinoma and sarcomatous cells that may be either of uterine or extrauterine origin.
neuroendocrine tumor , neuroendocrine cell tumor any of a diverse group of tumors containing neurosecretory cells that cause endocrine dysfunction; most are carcinoids or carcinomas.
nonfunctional tumor , nonfunctioning tumor a tumor located in an endocrine gland but not secreting hormones.
odontogenic tumor a lesion derived from mesenchymal or epithelial elements, or both, that are associated with the development of the teeth; it occurs in the mandible or maxilla, or occasionally the gingiva.
papillary tumor papilloma.
pearl tumor , pearly tumor cholesteatoma.
peripheral neuroectodermal tumor a primitive neuroectodermal tumor occurring outside of the central nervous system in a site such as the pelvis, a limb, or the chest wall.
phyllodes tumor a large, locally aggressive, sometimes metastatic fibroadenoma in the breast, with an unusually cellular, sarcomalike stroma.
primitive neuroectodermal tumor (PNET) proposed name for a heterogeneous group of neoplasms thought to derive from undifferentiated cells of the neural crest.
proliferating trichilemmal tumor a large, solitary, multilobulated lesion of the hair follicle, occurring on the scalp, usually in middle-aged or older women; often confused with squamous cell carcinoma.
sand tumor psammoma.
squamous odontogenic tumor a benign odontogenic epithelial neoplasm occurring in the mandible or maxilla and believed to derive from transformation of the rests of Malassez.
stromal tumors a diverse group of tumors derived from the ovarian stroma, many of which secrete sex hormones.
teratoid tumor teratoma.
testicular tumor a general term for any tumor of the testes; in adults these are almost always malignant germinomas, whereas in children many are yolk sac tumors or benign varieties such as teratomas or androblastomas.
theca cell tumor a fibroid-like ovarian tumor containing yellow areas of lipoid material derived from theca cells.
turban tumor a term used to describe the gross appearance of multiple cutaneous cylindromas of the scalp.
virilizing tumor a functional tumor that produces virilization in girls and women or precocious sexual development in boys.
Warthin's tumor adenolymphoma.
Wilms' tumor a rapidly developing malignant mixed tumor of the kidneys, made up of embryonal elements, usually affecting children before the fifth year.
yolk sac tumor a germ cell tumor that represents a proliferation of both yolk sac endoderm and extraembryonic mesenchyme; it produces α-fetoprotein and is usually in the testes.
tu·mor (t  m r)n. 1. An abnormal growth of tissue resulting from uncontrolled, progressive multiplication of cells and serving no physiological function; a neoplasm. 2. A swollen part; a swelling. |
Tumor
An abnormal growth of tissue resulting from uncontrolled, progressive multiplication of cells.
Mentioned in: Atelectasis, Choriocarcinoma, Laparoscopy, Mycetoma, Neurofibromatosis, Retinoblastoma
tumor (T)
[t(y)o̅o̅′mər]
Etymology: L
1 a swelling or enlargement occurring in inflammatory conditions.
2 also called neoplasm. a new growth of tissue characterized by progressive, uncontrolled proliferation of cells. The tumor may be localized or invasive, benign or malignant. A tumor may be named for its location, for its cellular makeup, or for the person who first identified it.
tumor,
n a swelling. Through usage the term is now synonymous with
neoplasm. See also neoplasm.
neoplasm. See also neoplasm.
tumor, adenomatoid odontogenic (AOT)
n a benign tumor that develops from odontogenic epithelium and usually surrounds the crown of an impacted tooth; histologically, it is composed of ducts lined by cuboidal or columnar cells. Also known as
adenoameloblastoma and
ameloblastic adenomatoid tumor.
adenoameloblastoma and
ameloblastic adenomatoid tumor.
tumor, basaloid mixed,
n See carcinoma, adenocystic.
tumor, Brooke's,
n.pr See epithelioma adenoides cysticum.
tumor, brown,
n a central giant cell tumor of the bone; associated with parathyroidism.
tumor, carotid body,
n a tumor formed about the carotid artery.
tumor, collision,
n a rare condition in which two neoplasms, both growing in the same general area, collide with the tumor elements and become intermingled.
tumor, Ewing's (endothelioma, Ewing's sarcoma),
n.pr See sarcoma, Ewing's.
tumor, giant cell,
n a benign neoplasm of bone, producing resorption and characterized by giant cells.
tumor, granular cell,
n a benign tumor of the oral soft tissue, most commonly the tongue. Usually of neural origin, these are characterized by the presence of large polygonal cells with a granular cytoplasm.
tumor, hormonal,
n localized enlargements of the gingivae that have the appearance of neoplasms and are associated with hormonal imbalance during pregnancy. Not a true tumor.
tumor, inflammatory,
tumor, keratocystic odontogenic,
tumor marker,
n substances that are often found in elevated levels in the bloodstream, urine, or other bodily tissues when cancer is present in the body.
tumor, mixed,
n 1. one of a group of neoplasms of the salivary glands the histologic appearance of which suggests both epithelial and connective tissue origin, although they presently are considered of epithelial origin only. Benign and malignant types are possible.
2. a tumor arising from cells derived from more than one germ layer.
2. a tumor arising from cells derived from more than one germ layer.
)
Mixed tumor.
tumor, mucoepidermoid,
tumor, odontogenic
n a neoplasm produced from tooth-forming tissues (e.g., odontogenic fibroma, odontogenic myxoma, ameloblastoma). See also calcifying epithelial odontogenic tumor.
tumor, turban,
n See carcinoma, basal cell.
tumor, Warthin's,
tumor
1. swelling, one of the cardinal signs of inflammation; morbid enlargement.
2. neoplasm; a new growth of tissue in which cell multiplication is uncontrolled and progressive. A cancer.
Tumors are called also cancers or neoplasms, which means that they are composed of new and actively growing tissue. Their growth is faster than that of normal tissue, continuing after cessation of the stimuli that evoked the growth, and serving no useful physiological purpose.
Tumors are classified in a number of ways, one of the simplest being according to their origin and whether they are malignant or benign. Tumors of mesenchymal origin include fibroelastic tumors and those of bone, fat, blood vessels and lymphoid tissue. They may be benign or malignant (sarcoma). Tumors of epithelial origin may be benign or malignant (carcinoma); they are found in glandular tissue or such organs as the mammary gland, stomach, uterus or skin. Mixed tumors contain different types of cells derived from the same primary germ layer, and teratomas contain cells derived from more than one germ layer; both kinds may be benign or malignant.
ACTH secreting tumor
see corticotroph adenoma.
benign tumor
grows slowly, pushing aside normal tissue but not invading it. They are usually encapsulated, well-demarcated growths. They are not metastatic; that is, they do not form secondary tumors in other organs. Benign tumors usually respond favorably to surgical treatment and some forms of radiation therapy.
tumor blush
in cerebral arteriography, the pooling of contrast material where the blood-brain barrier has been interrupted.
brown tumor
a giant-cell granuloma produced in and replacing bone, occurring in osteitis fibrosa cystica and due to hyperparathyroidism.
Burkitt's tumor
see burkitt's lymphoma.
button tumor
histiocytoma.
carotid body tumor
see carotid body tumors.
β cell tumor
see insulinoma.
tumor clinical staging
see staging (2).
connective tissue tumor
any tumor arising from a connective tissue structure, e.g. a fibroma or fibrosarcoma.
desmoid tumor
see desmoid (2).
tumor enhancement
see tumor enhancement.
erectile tumor
cavernous hemangioma.
false tumor
structural enlargement due to extravasation, exudation, echinococcus or retained sebaceous matter.
gastrin-secreting tumor
giant cell tumor
see giant cell tumor.
granulosa tumor, granulosa cell tumor
a sex chord-stromal tumor, often referred to as granulosa-theca cell tumor, of the ovary originating in the cells of the cumulus oophorus. See also granulosa cell tumor.
granulosa-theca cell tumor
an ovarian tumor composed of granulosa (follicular) cells and theca cells; either form may predominate. See also granulosa-theca cell tumor.
heterologous tumor
one made up of tissue differing from that in which it grows.
homoiotypic tumor, homologous tumor
one made up of tissue resembling that in which it grows.
Hürthle cell tumor
a new growth of the thyroid gland composed wholly or predominantly of Hürthle cells. See also hürthle cell tumor.
tumor immunology
see tumor-specific antigen.
tumor immunotherapy
see immunotherapy.
islet cell tumor
a tumor of the islets of Langerhans, which may result in hyperinsulinism. See also insulinoma.
tumor lysis syndrome
a possible sequel to chemotherapy in which very rapid destruction of highly sensitive tumor cells results in release of large amounts of nucleic acid purines, lactate and uric acid which exceed renal and hepatic excretory mechanisms. Characterized by hyperkalemia, hyperphosphatemia, hypocalcemia, hyperuricemia and renal failure.
malignant tumor
composed of embryonic, primitive, or poorly differentiated cells. They grow in a disorganized manner and so rapidly that nutrition of the cells becomes a problem. For this reason necrosis and ulceration are characteristic of malignant tumors. They also invade surrounding tissues and are metastatic, initiating the growth of similar tumors in distant organs. See also cancer.
mast cell tumor
a benign, but occasionally malignant, local aggregation of mast cells forming a nodulous tumor. Mast cell tumors with diffuse visceral involvement are called systemic mastocytosis. See also mast cell tumor.
mixed tumor
one composed of more than one type of neoplastic tissue, as in mammary tumors.
tumor necrosis factor (TNF)
two related cytokines produced by macrophages (TNF-α) and some T cells (TNF-β) that are cytotoxic for tumor cells but not for normal cells and which exert a variety of other inflammatory effects. See also lymphotoxin.
tumor-node-metastases (TNM) classification
see TNM staging.
non-neoplastic tumor
tumor (1).
organoid tumor
teratoma.
phantom tumor
abdominal or other swelling not due to structural change.
sand tumor
psammoma.
tumor-specific antigen (TSA)
see tumor-specific antigen.
true tumor
neoplasm.
tumor
1. A neoplasm, benign or malignant. See Benign tumor, Blue cell tumor, Bone tumor, Borderline tumor, Brain tumor, Carcinoid tumor, Carcinoma ex-mixed tumor, Carotid body tumor, Desmoid tumor, Desmoplastic round cell tumor, Ewing family
of tumors, Fibrous tumor of childhood, Gastrointestinal autonomic nerve tumor, Gastrointestinal stromal tumor, Giant cell tumor of tendon sheath, Glial tumor, Glomus tumor, Granular cell tumor, Heart tumor, Hilus tumor, Hürthle cell tumor, Internists' tumor, Intracranial tumor, Krükenberg tumor, Kulchitsky cell tumor, Leydig cell tumor, Malignant mesodermal tumor, Medullary tumor, Metastatic tumor, Metastatic brain tumor, Mixed tumor, Neuroectodermal tumor, Neuroendocrine
tumor, Pancreatic endocrine tumor, Peripheral nerve sheath tumor, Phantom tumor, Pigmented neuroectodermal tumor of infancy, Potato tumor, Pott's puffy tumor, Primary tumor, Pseudotumor, Pseudotumor cerebri, Round cell tumor, Sclerosing
stromal tumor, Secondary tumor, Sex cord-stromal tumor, Skin adnexal tumor, Small round cell tumor, Solid tumor, Solid tumor of childhood, Spaghetti tumor, Spontaneous tumor, Steroid cell tumor, Sugar tumor, Theca cell tumor, Triton tumor, Turban
tumor, Warthin's tumor, Wilms tumor, Yolk sac tumor 2. A term of waning popularity for a local swelling
Patient discussion about hormonal tumor.
Q. what is carcinoid tumors? I had my appendix removed and the doctor came in the room very shocked and said it was full of carcinoid tumors. Im scared to get them somewhere else.
A. i think the shock was not to find carcinoid tumors in the appendix...it's your age...you usually find this tumors at people over 60...
i think the next stage is colonoscopy, to look for more, not that you have more, just to make sure. but didn't the Doctor told you that? i would look for a consultation with a gastro specialist about it..
i think the next stage is colonoscopy, to look for more, not that you have more, just to make sure. but didn't the Doctor told you that? i would look for a consultation with a gastro specialist about it..
Q. Is it safe to have sex with a woman with cancer of the uterus? My 45-years old wife was told she have cancer in the uterus, and will have an operation soon. Meanwhile, should we use a condom during sex? Can the tumor pass from her to me (like AIDS or HPV)?
A. unless the cancer has lots of bleeding, you don't need to use condoms.
but if your wife would undergo an operation, maybe you need to be off-of-that-sex 1-2 days prior to operation day, just to make sure there's no super infection that will bother the operation plan.
but if your wife would undergo an operation, maybe you need to be off-of-that-sex 1-2 days prior to operation day, just to make sure there's no super infection that will bother the operation plan.
Q. How do doctors find out if a tumor is malignant? What procedure is done to see if a tumor is malignant? Is a simple MRI enough to make that conclusion?
A. It depends on what type of tumor- what organ is involved and how big is it. Sometimes a simple blood test can show high levels of tumor markers and sometimes just the shape and size of it on CT or MRI can hint that it is a malignant tumor. However, the final answer can only be by biopsy or removal of the tumor and microscopic tests (that's the pathology work-up the doctors send).
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