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The Pituitary Gland

The Pituitary Gland

The pituitary is a small endocrine organ in the sphenoid bone under the hypothalamus. Primarily, the pituitary in adults has two distinct anatomical and functional regions— the anterior and posterior lobes. During human fetal development, a third pituitary gland region called the pars intermedia atrophies and disappears. However, some of its cells migrate and exist adjacent to the anterior pituitary in adults.

Cushing Syndrome I: Introduction

Cushing Syndrome I: Introduction

Cushing syndrome refers to the collection of clinical manifestations that arise when tissues are exposed to excessive amounts of cortisol or cortisol-like medications over an extended period. Cortisol, a glucocorticoid produced by the adrenal cortex, regulates metabolism, immune responses, and the body’s adaptation to stress. When its concentration remains chronically elevated, these physiological pathways become dysregulated, resulting in the characteristic features of the syndrome.Exogenous...

Cushing Syndrome II: Pathophysiology

Cushing Syndrome II: Pathophysiology

Cortisol production is normally governed by the hypothalamic–pituitary–adrenal (HPA) axis, which maintains hormonal balance through tightly regulated feedback mechanisms. Disruption of this regulatory system is central to the development of Cushing syndrome, whether the excess cortisol originates from external medications or internal pathology. Persistent cortisol elevation alters metabolism, immune function, and endocrine signaling, producing the characteristic clinical features of the...

Type I Diabetes III: Clinical Manifestations

Type I Diabetes III: Clinical Manifestations

Type 1 diabetes mellitus typically presents with rapid-onset symptoms due to the body’s inability to utilize glucose in the absence of insulin. Since insulin is required for glucose uptake into cells, its deficiency leads to hyperglycemia and cellular energy deprivation, resulting in characteristic clinical features.Polyuria and PolydipsiaOne of the earliest, most prominent symptoms is polyuria (excessive urination). When blood glucose concentrations rise above the renal threshold, the kidneys...

Adrenal Gland Disorders

Adrenal Gland Disorders

Adrenal gland disorders manifest when the production of adrenal hormones deviates from the norm, resulting in either excessive or insufficient concentrations.
Adrenal insufficiency, characterized by insufficient cortisol and aldosterone production, leads to conditions like Addison's disease. This disorder, affecting the adrenal cortex, exhibits symptoms such as skin bronzing, dehydration, low blood pressure, fatigue, and weight loss. Congenital adrenal hyperplasia, a genetic ailment causing...

Hormones of the Pituitary Gland

Hormones of the Pituitary Gland

The small, pea-sized pituitary gland is located at the base of the brain. It is crucial in regulating various bodily functions, from growth to reproduction. The gland is divided into the anterior lobe and the posterior lobe. The secretory cell clusters in the pars distalis of the anterior pituitary lobe are controlled by hypothalamic regulators and synthesize six primary hormones.
The most abundantly secreted hormone from the anterior lobe is the growth hormone, which controls overall growth by...

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Related Experiment Video

Updated: May 21, 2026

Endoscopic Endonasal Trans-sphenoidal Approach: Minimally Invasive Surgery for Pituitary Adenomas

Endoscopic Endonasal Trans-sphenoidal Approach: Minimally Invasive Surgery for Pituitary Adenomas

Published on: January 17, 2018

[Pituitary adenoma--clinical case].

M Zemba¹, Camelia-Adriana Papadatu, Laura Nicoleta Sîrbu

¹Spitalul Clinic de Urgenţă Militar Central "Dr. Carol Davila" Bucureşti.

Oftalmologia (Bucharest, Romania : 1990)

|May 31, 2012

Summary

A pituitary adenoma, a serious condition, was diagnosed through an eye exam. Early ocular symptoms were overlooked until vision loss prompted medical attention.

Area of Science:

Ophthalmology
Neurosurgery
Endocrinology

Background:

Pituitary adenomas can present with subtle, slowly progressing hormonal changes.
Ophthalmological symptoms may be the initial indicator of a pituitary adenoma.

Observation:

A patient presented with visual acuity decline as the primary concern.
The patient had been experiencing gradual, unnoticed hormonal imbalances.

Findings:

A deep ophthalmological examination led to the diagnosis of a pituitary adenoma.
The condition was identified as a serious, potentially life-threatening neurosurgical and endocrinological issue.

Implications:

Highlights the critical role of comprehensive eye examinations in detecting systemic diseases.

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A Novel Method: Super-selective Adrenal Venous Sampling

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Last Updated: May 21, 2026

Endoscopic Endonasal Trans-sphenoidal Approach: Minimally Invasive Surgery for Pituitary Adenomas

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Published on: January 17, 2018

Two-dimensional Gel Electrophoresis Coupled with Mass Spectrometry Methods for an Analysis of Human Pituitary Adenoma Tissue Proteome

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Published on: April 2, 2018

A Novel Method: Super-selective Adrenal Venous Sampling

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Underscores the importance of patient awareness regarding subtle hormonal changes.

Emphasizes the need for multidisciplinary collaboration in managing complex pituitary adenomas.