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 The use of hematoxylin and eosin staining to identify pituitary tumors is obsolete.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 ?
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.
Thyroid follicular adenomas may display features of follicular carcinoma and follicular variant of papillary carcinoma.
Six goiters and 1 follicular adenoma were negative on the core and positive on the whole section, in contrast to 1 follicular adenoma that was interpreted as positive on the core and negative on the whole section.
This finding is similar to that seen in the thyroid gland, where some cytologic features reminiscent of papillary carcinoma, such as cells with clear nuclei, may be seen in hyperplastic thyroid lesions and follicular adenoma.
The differential diagnosis based on imaging includes differentiated thyroid carcinoma, multinodular goiter, follicular adenoma, medullary carcinoma, non-Hodgkin's lymphoma, and hemorrhagic colloid cyst.
Most of the euthyroid patients had follicular adenoma (table 3).
Many neoplasms are considered in the differential diagnosis, but the principal ones are follicular adenoma, follicular carcinoma, and medullary carcinoma; nonneoplastic considerations are diffuse hyperplasia (Graves' disease) and adenomatoid nodules.
Pathology had revealed nodular hyperplasia in the fight lobe of the thyroid, and follicular adenoma with areas of severe acute and chronic inflammation and foci of abscesses in the left lobe.
Eighty-one percent of the cases were found to have follicular adenoma in the surgical specimen (Figure 4).
Among the 12, final surgical pathology eventually revealed that nine patients had a follicular adenoma, two had nodular hyperplasia, and one had multinodular goiter.
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