Related Experiment Video
Updated: Jul 6, 2026
06:59
A Novel Approach for the Administration of Medications and Fluids in Emergency Scenarios and Settings
Published on: November 9, 2016
A 61-year-old man with hyponatremia.
Brain Pathology (Zurich, Switzerland)
|March 28, 2008
Summary
A rare intrasellar cellular schwannoma mimicked a pituitary adenoma in a 61-year-old man. Surgical removal resolved symptoms, highlighting the importance of considering rare tumors in differential diagnoses.
Area of Science:
- Neuroendocrinology
- Neurosurgery
- Pathology
Background:
- Pituitary adenomas are common sellar tumors.
- Differentiating rare sellar masses from adenomas is clinically challenging.
Observation:
- A 61-year-old man presented with dizziness, nausea, vomiting, hyponatremia, and low hormone levels (ADH, cortisol, testosterone).
- Imaging revealed an intra- and suprasellar tumor with adenoma-like features.
- The tumor displaced the optic chiasm but did not infiltrate the cavernous sinus.
Findings:
- Histological examination diagnosed a cellular schwannoma.
- The patient experienced no postoperative complications, such as anterior lobe insufficiency or diabetes insipidus.
Implications:
- Intrasellar cellular schwannomas are rare and can mimic non-secreting pituitary adenomas.
- Consideration of rare entities like schwannomas is crucial in the differential diagnosis of sellar tumors.
- Accurate diagnosis and surgical management are key for favorable patient outcomes.
Related Concept Videos
01:29Diabetes Insipidus I: Introduction
Definition Diabetes insipidus is a disorder marked by the production of large amounts of dilute urine because of impaired vasopressin production, release, or kidney response. The lack of effective vasopressin action limits water reabsorption in the renal collecting ducts, which leads to excessive urinary water loss and intense thirst.Clinical PresentationIndividuals with diabetes insipidus report persistent thirst and very high urine output. In severe cases, fluid intake can reach up to 20...
01:29Disorder of Water Balance
Water balance disorders are medical conditions that occur when there is a deviation from the body's water volume or osmolarity, disrupting normal homeostasis and leading todehydration, hypotonic hydration, hyperhydration, edema, or water intoxication.
Dehydration
Dehydration occurs when the body loses fluids (particularly water).
Causes:
The major causes of dehydration include excessive sweating, fever, vomiting, diarrhea, and diuresis.
Signs and Symptoms:
Symptoms primarily include intense...
Dehydration
Dehydration occurs when the body loses fluids (particularly water).
Causes:
The major causes of dehydration include excessive sweating, fever, vomiting, diarrhea, and diuresis.
Signs and Symptoms:
Symptoms primarily include intense...
01:21Hyperosmolar Hyperglycemic State
Hyperosmolar Hyperglycemic State, or HHS, is a serious and life-threatening complication of type 2 diabetes mellitus. It is characterized by three main features: severe hyperglycemia, profound dehydration, and elevated serum osmolality, all occurring without significant ketoacidosis.HHS typically develops in older adults or individuals with limited access to fluids. This may result from illness, cognitive impairment, or medications such as diuretics or corticosteroids. These factors reduce...
01:25Regulation of Water Intake
Osmolality refers to the number of solute particles per kilogram of solvent in a solution. Plasma osmolality specifically indicates the total number of solute particles per kilogram of water in blood plasma. This value reflects the body's hydration status and is tightly regulated through mechanisms controlling water intake and output. While water consumption is a conscious decision, the body has intrinsic regulatory systems to maintain fluid balance. Dehydration, a state of water deficit...
01:15Drug Dosing: Geriatric Patients
Elderly individuals encompass a diverse population with varying degrees of age-related physiological changes. Defining the elderly presents challenges, as the geriatric population is often arbitrarily categorized as individuals older than 65. However, many individuals in this group lead active and healthy lives, with an increasing number surpassing 85 years and falling into the older elderly category. Physiological changes associated with aging impact performance capacity and homeostatic...
01:22Diabetes Insipidus II: Pathophysiology
Normally, water balance is maintained through three interconnected mechanisms: the hypothalamic thirst center, the synthesis and release of antidiuretic hormone (ADH, or vasopressin), and the kidneys' responsiveness to this hormone. ADH is synthesized in the hypothalamus, released from the posterior pituitary, and acts on the distal nephron, allowing water reabsorption and concentrated urine production.Diabetes Insipidus and Its TypesIn diabetes insipidus (DI), this regulatory system is...