| adenomatoid odontogenic tumour | A benign epithelial odontogenic tumour appearing radiographically as a well-circumscribed radiolucent-radiopaque lesion usually surrounding the crown of an impacted tooth in an adolescent or young adult; characterised histologically by columnar cells organised in a duct-like configuration interspersed with spindle-shaped cells and amyloid-like deposition that gradually undergoes dystrophic calcification. Synonym: adenoameloblastoma, ameloblastic adenomatoid tumour. (05 Mar 2000) |
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| adenomatoid tumour | A small, circumscribed, benign tumour of the genital tract, composed of small glandlike spaces lined by flattened or cuboidal mesothelium-like cells. (12 Dec 1998) |
| adenomatosis | <oncology> Abnormal formation of glandular tumours, usually in more than one gland. (15 Jan 1998) |
| adenomatosis, pulmonary | A neoplastic disease in which the alveoli and distal bronchi are filled with mucus and mucus-secreting columnar epithelial cells. It is characterised by abundant, extremely tenacious sputum, chills, fever, cough, dyspnea, and pleuritic pain. (12 Dec 1998) |
| adenomatous | Relating to an adenoma, and to some types of glandular hyperplasia. (05 Mar 2000) |
| adenomatous colon polyps | <radiology> Probability of malignancy by size and type Size (cm) less than 1 1-2 greater than 2 --------------------------- tubular 1% 10% 34% mixed (TV) 4% 9% 45% villous 10% 10% 54%, most colon polyps (90%) are hyperplastic (size less than 5 mm) (12 Dec 1998) |
| adenomatous goiter | An enlargement of the thyroid gland due to the growth of one or more encapsulated adenomas or multiple nonencapsulated colloid nodules within its substance. (05 Mar 2000) |
| adenomatous polyp | A polyp that consists of benign neoplastic tissue derived from glandular epithelium. Synonym: cellular polyp, polypoid adenoma. (05 Mar 2000) |
| adenomatous polyposis coli | An autosomal dominant polyposis syndrome in which the colon contains few to thousands of adenomatous polyps, often occurring by age 15 to 25. (12 Dec 1998) |
| adenomatous polyps | Benign neoplasms derived from glandular epithelium. (12 Dec 1998) |
| renal cortical adenoma | <tumour> One of the usually small adenoma's sometimes found in the renal cortex and derived from renal tubular tissue. (05 Mar 2000) |
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| gonadotrophin-producing adenoma | <tumour> A rare type of pituitary adenoma that produces FSH and LH; its cells can be identified only by immunochemical techniques. (05 Mar 2000) |
| gonadotropin-producing adenoma | <tumour> A rare type of pituitary adenoma that produces FSH and LH; its cells can be identified only by immunochemical techniques. (05 Mar 2000) |
| growth hormone-producing adenoma | <tumour> An adenoma that produces the clinical picture of gigantism or acromegaly, although a third of the cells have no granules or are a mixture of acidophils and chromophobes; some tumours may secrete both growth hormone and prolactin; often an acidophil or eosinophil adenoma. (05 Mar 2000) |
| chromophil adenoma | <tumour> Any adenoma composed of cells that stain readily. (05 Mar 2000) |
| chromophobe adenoma | <tumour> A tumour of the adenohypophysis whose cells do not stain with either acid or basic dyes. (05 Mar 2000) |
| chromophobic adenoma | <tumour> A tumour of the adenohypophysis whose cells do not stain with either acid or basic dyes. (05 Mar 2000) |
| microcystic adenoma of pancreas | <radiology> Benign tumour of pancreas, M:F = 1:4, peak age 69 years of age, tiny cysts filled with GLYCOGEN, not mucin, large (ca. 10 cm), innumerable small cysts (1mm - 20mm), central stellate scar with or without calcification, hypervascular, head = body = tail, ** associated with von Hippel-Lindau syndrome, Cf: macrocystic adenoma, alias mucinous cystic neoplasm (12 Dec 1998) |
| microfollicular adenoma | <tumour> A foetal adenoma of the thyroid composed of very small follicles and solid alveolar groups of thyroid epithelial cells. (05 Mar 2000) |
| Pick's tubular adenoma | A neoplasm of the ovary, arising from the ovarian stroma, mimicking to a greater or lesser extent derivatives of the sex cord mesenchyme of the testis, and sometimes causing defeminization and virilization. (12 Dec 1998) |
| monomorphic adenoma | <tumour> A benign ductal neoplasm of the salivary glands, with a uniform epithelial pattern and lacking the chondromyxoid stroma of a pleomorphic adenoma. (05 Mar 2000) |
| colloid adenoma | <tumour> A follicular adenoma of the thyroid, composed of large follicles containing colloid. Synonym: macrofollicular adenoma. (05 Mar 2000) |
| pituitary adenoma | <radiology> Benign, slow-growing, arises from adenohypophysis (anterior lobe), 5-18% of all intracranial neoplasms plain film (unreliable): enlargement of sella and sloping of the sella floor, erosion of the anterior and posterior clinoid, erosion of the dorsum sellae, calcified in less than10%, may present as a mass in the nasopharynx functioning microadenoma, less than10 mm, 20-30% of pituitary adenomas, types: prolactinoma, corticotrophic adenoma, somatotrophic adenoma, nonfunctioning macroadenoma, more than 10 mm, 70-80% of pituitary adenomas (12 Dec 1998) |
| pleomorphic adenoma | A tumour composed of salivary gland epithelium and fibrous tissue with mucoid or cartilaginous areas. Synonym: pleomorphic adenoma. (05 Mar 2000) |
| corticotrophic adenoma | <oncology, tumour> ACTH-secreting tumour, posterior lobe of the pituitary (central location), usually less than 5mm. See: Cushing disease, pituitary adenoma. (12 Dec 1998) |