adenoma
[ad″ĕ-no´mah] a benign epithelial tumor in which the cells form recognizable glandular structures or in which the cells are derived from glandular epithelium.
acidophilic adenoma in a classification system formerly used for
pituitary adenomas, an adenoma whose cells stain pale pink with acid dyes; most adenomas that secreted excessive amounts of growth hormone were in this group
basophilic adenoma in a classification system formerly used for
pituitary adenomas, an adenoma whose cells stain pale blue with basic dyes; most adenomas that secreted excessive amounts of adrenocorticotrophic hormone were in this group.
chromophobe adenoma (
chromophobic adenoma) a
pituitary adenoma composed of cells that lack acidophilic or basophilic granules; this is the same entity as the more precisely named
null-cell a. hepatocellular adenoma a large, fleshy, hypervascular tumor of the liver occurring chiefly in women of childbearing age and associated with oral contraceptive use. It is composed of sheets of cells with areas of hemorrhage and necrosis and has a tendency to hemorrhage and rupture; it may become malignant.
null-cell adenoma a pituitary adenoma whose cells give negative results on tests for staining and hormone secretion; although classically they were considered to be composed of sparsely granulated or degranulated (nonfunctioning) cells, some contain functioning cells and may be associated with a hyperpituitary state such as acromegaly or Cushing's syndrome. These tumors are often discovered clinically only when they have grown large and are pressing on surrounding structures. Called also
chromophobic adenoma. prolactin cell adenoma (
prolactin-secreting adenoma)
prolactinoma.
adenoma seba´ceum nevoid hyperplasia of sebaceous glands, forming multiple yellow papules or nodules on the face. See also
nevus.
villous adenoma a large soft papillary polyp on the mucosa of the large intestine.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
ad·e·no·ma
(ad'ĕ-nō'mă), A benign epithelial neoplasm in which the tumor cells form glands or glandlike structures; usually well circumscribed, tending to compress rather than infiltrate or invade adjacent tissue.
[adeno- + G. -oma, tumor]
Farlex Partner Medical Dictionary © Farlex 2012
adenoma
(ăd′n-ō′mə)n. pl. adeno·mas or
adeno·mata (-mə-tə) A benign epithelial tumor having a glandular origin and structure.
ad′e·nom′a·toid′ (ăd′n-ŏm′ə-toid′) adj.
ad′e·nom′a·tous (-ŏm′ə-təs) adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
adenoma
A generic term for a benign epithelial tumour composed of glands and/or glandular elements.
adenoma (large intestine)
A premalignant lesion consisting of a dysplastic clonal proliferation of colonic epithelium.
Epidemiology
12% of the US population has adenomas by the 5th decade of life, of which 25% are high-risk (high-grade dysplasia) lesions; the risk of future carcinoma is increased if there is a positive family history and a “high-risk” diet—e.g., high meat, high fat, low fibre.Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
ad·e·no·ma
, pl. adenomas, pl. adenomata (ad'ĕ-nō'mă, -măz, -mă-tă) An ordinarily benign neoplasm of epithelial tissue in which the tumor cells form glands or glandlike structures in the stroma; usually well circumscribed, tending to compress rather than infiltrate or invade adjacent tissue.
[adeno- + G. -oma, tumor]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
adenoma
A benign (non-malignant) and relatively common TUMOUR arising from lining tissue that contains glands. The glandular structure is retained in the tumour which may continue to secrete, and often over-produce, the original product.Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
Adenoma
A growth of cells, usually a benign tumor, that forms a gland or gland-like substance. These tumors can secrete hormones or cause changes in hormone production in nearby glands.
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.
ad·e·no·ma
, pl. adenomas, pl. adenomata (ad'ĕ-nō'mă, -măz, -mă-tă) A benign epithelial neoplasm in which the tumor cells form glands or glandlike structures; usually well circumscribed, tending to compress rather than infiltrate or invade adjacent tissue.
[adeno- + G. -oma, tumor]
Medical Dictionary for the Dental Professions © Farlex 2012
Patient discussion about adenoma
Q. Blood in stools before and after polyp removel, Avms of the deodenel loop, inside hems, and 3cin tubuo adenoma Hi, On Nov of 06 I had a colonoscopy done and they didnt find any thing that could be mking me bleed and go to the rest room often. Then in Nov of 07 did a EDg and found I have AVMs of the deodenel loop.She Burned them and I didnt have any more bleeding till June of thei yr.On 6/6/08 i had another EDg done she burned more AVMs and on Mon I started bleeding again. This time she did a colonoscopy and found I had inside hems and a 3cin tubuolvillous adenoma inflamed.She cut, burned, and took it out in peices.She saye she will go back in Nov of this yr and look again. Two weeks after I had this done I had started
to bleed again and had bad such bad pain in my hip I had to hold on to walk. that same day i started to bleed again. I bled out big clots and a bowl full of blood! A few days later the pain went away but was still bleeding ever time I had bowl movement!I can bleed up to 4 days at a times sometimes. I have been taking HC supp. and it seems to have stoped the bleeding and pain!
A. It is normal that after a polyp removal you will continue bleeding some more. However, if you feel like there is a lot of bleeding, and/or you are not feeling well, you should see a doctor as soon as possible to stop the bleeding or look for the source of bleeding.
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