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Increased Intracranial Pressure ll: Pathophysiology01:29

Increased Intracranial Pressure ll: Pathophysiology

Increased intracranial pressure (ICP) refers to a potentially life-threatening rise in pressure inside the skull. This usually happens when there is a major change in the volume of brain tissue, blood, or cerebrospinal fluid (CSF) — the three components inside the skull. According to the Monro-Kellie doctrine, if the volume of one component increases, the volumes of the other components must decrease to maintain normal pressure. If this does not happen, ICP rises.The process often begins with...
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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.
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Graves’ disease is an autoimmune disorder characterized by the production of thyroid-stimulating immunoglobulins (TSI) that activate TSH receptors, leading to excessive synthesis and release of thyroid hormones (T3 and T4) and resulting in hyperthyroidism.Among all causes of hyperthyroidism, Graves’ disease is the most common and can happen at any age, though it is more frequent in women. It produces a hypermetabolic state with features such as weight loss, tachycardia, tremor, and heat...
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Hypothyroidism is a disorder characterized by insufficient production of thyroid hormones, which regulate metabolism, energy balance, and multiple organ systems.TypesHypothyroidism is classified based on the level of dysfunction. Primary hypothyroidism results from intrinsic thyroid gland dysfunction, causing reduced hormone production despite normal or increased stimulation. Secondary hypothyroidism arises from inadequate thyroid-stimulating hormone (TSH) secretion by the pituitary. Tertiary...
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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...
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Intracranial hypertension is a sustained elevation of intracranial pressure (ICP) above 22 mm Hg. In supine adults, normal ICP is ~7–15 mm Hg.The rigid, nonexpandable cranium contains three components—brain tissue, blood, and cerebrospinal fluid (CSF)—that total ~1,700 mL in a typical adult: 1,400 mL brain (~80%), 150 mL blood (~10%), and 150 mL CSF (~10%). According to the Monro–Kellie doctrine, total intracranial volume is effectively fixed. When one component expands, CSF and venous blood...

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Endoscopic Endonasal Trans-sphenoidal Approach: Minimally Invasive Surgery for Pituitary Adenomas
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Hypothalamic/pituitary morbidity in skull base pathology.

Paul Lee1, Ken K Y Ho, Jerry R Greenfield

  • 1Department of Diabetes and Endocrinology, Princess Alexandra Hospital, 199 Ipswich Road, Woolloongabba, Brisbane, Queensland, Australia 4102.

Otolaryngologic Clinics of North America
|August 9, 2011
PubMed
Summary

Skull base pathologies can cause hypopituitarism and hypothalamic dysfunction. This review addresses the consequences of pituitary hypofunction in young patients, such as those with craniopharyngioma.

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Area of Science:

  • Neuroendocrinology
  • Oncology
  • Skull Base Surgery

Background:

  • Pituitary and hypothalamic dysfunction can arise from skull base pathologies.
  • Craniopharyngioma is a common cause of hypopituitarism in pediatric and young adult populations.

Purpose of the Study:

  • To review the epidemiology, pathophysiology, clinical presentation, investigation, management, and prognosis of hypopituitarism and hypothalamic dysfunction secondary to skull base pathologies.
  • To answer the clinical question regarding the consequences of pituitary hypofunction in young patients.

Main Methods:

  • Comprehensive literature review of studies on skull base pathologies and their impact on the pituitary and hypothalamus.
  • Synthesis of information on clinical presentation, diagnostic workup, and treatment strategies.
  • Analysis of outcomes and prognosis based on existing data.

Main Results:

  • Skull base pathologies present with diverse neurological and endocrine symptoms.
  • Management requires a multidisciplinary approach involving neurosurgery, endocrinology, and radiation oncology.
  • Timely diagnosis and treatment are crucial for optimizing outcomes and preventing long-term sequelae.

Conclusions:

  • Hypopituitarism and hypothalamic dysfunction due to skull base pathologies significantly impact patient health and quality of life.
  • Understanding the multifaceted consequences is essential for effective patient management.
  • Further research is needed to optimize treatment protocols and improve long-term prognoses.