pituitary


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pituitary

 [pĭ-tu´ĭ-tar″e]
1. pertaining to the pituitary gland.
3. a preparation of the pituitary glands of animals, used therapeutically.
pituitary gland an endocrine gland located at the base of the brain in a small recess of the sphenoid bone called the sella turcica. It is attached by the hypophyseal stalk to the hypothalamus and is divided into an anterior lobe (the adenohypophysis) and a posterior lobe (the neurohypophysis), which differ in embryological function and origin. Called also hypophysis.

The adenohypophysis originates from epithelial tissue. The adenohypophysis secretes six important hormones: growth hormone, thyroid-stimulating hormone or thyrotropin, adrenocorticotropic hormone or corticotropin, prolactin, follicle-stimulating hormone, and luteinizing hormone. Most of these hormones are tropic hormones, which regulate the growth, development, and proper functioning of other endocrine glands and are of vital importance to the growth, maturation, and reproduction of the individual. Secretion of the anterior pituitary hormones is controlled by releasing and inhibiting hormones produced by the hypothalamus. Information gathered by the nervous system about the well-being of an individual is collected in the hypothalamus and used to control the secretion of hormones by the pituitary gland. The hypothalamic releasing and inhibiting hormones are transported to the pituitary gland by way of the hypothalamic-hypophyseal portal system in which the hypothalamic venules connect with the capillaries of the anterior pituitary.

The neurohypophysis originates from neural tissue; it stores and secretes two hormones, oxytocin and vasopressin (antidiuretic hormone). These hormones are synthesized in the cell bodies of neurons located in the hypothalamus and transported along the axons to the terminals located in the neurohypophysis and are released in response to neural stimulation.

Surgical removal of part or all of the pituitary gland is called hypophysectomy and is usually done for treatment of a pituitary tumor. Because of its influence on the adrenal cortex and other endocrine glands, removal of the pituitary gland has widespread effects on the body. See hypophysectomy.
The pituitary gland and its relationship to the hypothalamus.
posterior pituitary neurohypophysis.

pi·tu·i·tar·y

(pi-tū'i-tār'ē),
Relating to the pituitary gland (hypophysis).
Synonym(s): pituitarium
[L. pituita, a phlegm]

pituitary

(pĭ-to͞o′ĭ-tĕr′ē, -tyo͞o′-)
n. pl. pituitar·ies
1. The pituitary gland.
2. Medicine An extract from the anterior or posterior lobes of the pituitary gland, prepared for therapeutic use.
adj.
1. Of or relating to the pituitary gland.
2. Of or secreting phlegm or mucus; mucous.

pituitary

adjective Referring to the pituitary gland, see there.
 
noun Pituitary gland, see there.

pi·tu·i·tar·y

(pi-tū'i-tar-ē)
Relating to the pituitary gland (hypophysis).
[L. pituita, phlegm]

Pituitary

A gland located at the base of the brain that produces a number of hormones, including those that regulate growth and reproductive functions. Overproduction of the pituitary hormone called growth hormone (GH) is responsible for the condition known as acromegaly.

pi·tu·i·tar·y

(pi-tū'i-tar-ē)
Relating to the pituitary gland (hypophysis).
[L. pituita, phlegm]
References in periodicals archive ?
Market Research Future (MRFR) has published a research report that prophesizes an increase for the global pituitary cancer market with 9.4% CAGR (Compound Annual Growth Rate) between 2017 and 2023.The key factors driving the growth of this market include the growing geriatric population, increasing research & development (R&D) by key players in the market, and rising healthcare expenditures.
Of the total sample, Sheehan's syndrome (n=15) were all women, tuberculoma of pituitary gland were also found in women only (n=2), out of 10 patients having empty sella syndrome, seven were women, hypoplastic pituitary gland was found in two women and one man.
The aim is to provide clues for the diagnosis of pituitary disorders and to emphasize on prompt and early recognition of pituitary diseases for optimal clinical care and better long term outcomes in these patients.
However, the role of FOXM1 in the regulation of secreting pituitary adenoma cell proliferation remains unclear.
Please cite this article as: A Spectacular Endoscopic Anatomy of the Pituitary Gland and the Circle of Willis in a Living Person.
The database permits patients who have undergone pituitary surgery and have been pathologically diagnosed since 2015 to be entered prospectively; the database also allows patient data to be entered retrospectively for cases diagnosed before 2015, via electronic medical records.
In all three cases, MRI showed isointense to hypointense sellar mass on T1-weighted sequences with thickened pituitary stalk and only rim contrast enhancement.
Pituitary metastasis from small cell carcinoma of the lung.
On pituitary MRI, partial empty sella was detected with normal bright spot (pituitary height was 1.5 mm).
Integrative analysis of gene expression profiles in pituitary adenomas will be more valuable compared with small-scale microarray-based expression profiling studies.
Sheehan et al., in 1999 published his data of a retrospective comparison of patients with non-functioning pituitary adenoma (NFPA) treated either with an endoscope,or with a sub-labial approach.6 Despite a small sample size (26 and 44 patients respectively) they noticed a significantly lower operative time with endoscope compared to the sub-labial approach (p< 0.001), without any difference in extent of resection, post-operative pituitary function visual field alterations or complication rates.
PA is a clinical syndrome caused by hemorrhage or infarction of the pituitary gland and is predominantly seen in patients with pituitary adenomas, probably due to their relatively high metabolism, limited blood flow, and high intratumoral pressure when compared to other primary central nervous system tumors (3).