follicular adenoma

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Related to follicular adenoma: follicular carcinoma

fol·lic·u·lar ad·e·no·ma

an adenoma of the thyroid with a simple glandular pattern.


(ad?e-no'ma) ('ma-ta) plural.adenomasplural.adenomata [ aden- + -oma]
A benign tumor made of epithelial cells, usually arranged like a gland. adenomatous (-no'ma-tus), adjective

Patient care

Initial care focuses on identifying the sites of tumors, performing biopsies or noninvasive studies to determine if they are benign or malignant, and discussing findings with the patient, the patient's family, and significant others. Disease-specific education is provided to explain diagnostic options and support the patient. Malignant adenomata may need surgical removal; they may be treated with a combination of therapies, including surgical removal, radiation therapy, hormone therapy or chemotherapy. Patient education, esp. with respect to the side effects of therapies and implementing strategies to ameliorate the side effects, is crucial. General emotional support of the patient eases anxiety, isolation, and suffering.

acidophilic adenoma

An adenoma of the pituitary gland in which cells stain with acid dyes. Such staining was formerly used to suggest the presence of growth hormones, the cause of acromegaly and gigantism. Immunocytochemistry is the modern means of classifying pituitary tumors.
Synonym: eosinophil adenoma; somatotroph adenoma

adrenocorticotrophin-secreting adenoma

A pituitary adenoma that secretes adrenocorticotropic hormone, the releasing hormone responsible for Cushing's syndrome.

basophil adenoma

, basophilic a.
An adenoma of the pituitary gland in which cells stain with basic dyes. The term was formerly used to suggest tumors that secreted adrenocorticotrophin (ACTH), the cause of Cushing syndrome. Those tumors are now identified more directly by the identification (by immunocytochemistry) of ACTH in tumor cells. The use of hematoxylin and eosin staining to identify pituitary tumors is obsolete.

chromophobe adenoma

An adenoma of the pituitary gland composed of cells that do not stain readily. The term has more historical value than descriptive value and is no longer in use.

cystic adenoma


eosinophil adenoma

, eosinophilic a.Acidophil adenoma.

fibroid adenoma


follicular adenoma

An adenoma of the thyroid.

gonadotroph-cell adenoma

The most common macroadenoma of the pituitary gland. It secretes either luteinizing hormone or follicle-stimulating hormone.

Hürthle cell adenoma

See: Hürthle, Karl W.

lactotroph adenoma


malignant adenoma


papillary adenoma

An adenoma with nipple-shaped glands.

pituitary adenoma

An adenoma of the pituitary gland, often of one of its functional cell types. It may produce excessive amounts of hormones such as prolactin, growth hormone, or adrenocorticotrophic hormone, or it may be clinically silent.

prolactin-secreting adenoma


sebaceous adenoma

Enlarged sebaceous glands, esp. of the face.
Synonym: adenoma sebaceum

adenoma sebaceum

Sebaceous adenoma.

somatotroph adenoma

A growth-hormone-secreting tumor of the anterior pituitary that causes acromegaly or giantism.

villous adenoma

A large polyp of the mucosal surface of the large intestine. It has the potential to develop into cancer.
References in periodicals archive ?
Papillary thyroid carcinoma arising in a follicular adenoma (hematoxylin-eosin, original Magnifications X40 [A], X200 [B], and X400 [C]).
Most of the malignant case 4/9 (44%) of follicular carcinomas and 12/28 (42%) of papillary carcinomas had a size that fell in the group 20-60cm3 while most of the benign cases of follicular adenomas 9/23 (39%) were falling in the group of <20cm3 (Fig.
Follicular adenoma shows significantly higher expression of CD 56 and E-Cadherin, whereas follicular carcinoma shows expression of HBME-14.
11%) was the commonest non-neoplastic lesion, follicular adenoma 10 (9.
Morphology and IHC staining suggested that the lesion was a variant of follicular adenoma.
colloid goitres, of 38 cases, 37 were histopathologically correct and one was incorrect, which was diagnosed later as follicular adenoma.
Follicular carcinoma must be distinguished from follicular adenoma, adenomatoid nodules, the follicular variant of thyroid papillary carcinoma, medullary carcinoma, and other clear-cell tumors (parathyroid adenoma/carcinoma) or metastatic renal cell carcinoma.
6-12) BRAF K601E is an unusual BRAF mutation, which had been reported in follicular variant of papillary thyroid carcinoma and rarely in follicular adenomas.
This is mainly due to the limitation of thyroid cytology in distinguishing follicular adenoma from carcinomas for which the diagnosis requires a detailed histopathological examination.
Postoperative histopathology showed that colloid goiter, malignancy, and follicular adenoma were the most common findings in the transient group, while malignancy and Hashimoto thyroiditis were the most common findings in the prolonged group.
Other benign lesions were follicular adenoma and lymphocytic thyroiditis observed in 38 (27.
In each 7 of 224 papillary thyroid carcinoma patients, concomitant Hurthle cell adenoma and follicular adenoma were present.

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