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Related Concept Videos

Disorders of Erythrocytes01:27

Disorders of Erythrocytes

Disorders of erythrocytes, or red blood cells (RBCs), include a range of conditions affecting their number, shape, or function.
Erythrocyte disorders can be broadly categorized into two main types: anemic and polycythemic conditions.
A low oxygen-carrying capacity of the blood due to the loss, lower production, or destruction of erythrocytes is termed anemia. Hemorrhagic anemia, for example, occurs when bleeding from an external wound or internal ulcer reduces erythrocyte counts.
On the other...
Graves Disease II: Pathophysiology01:24

Graves Disease II: Pathophysiology

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...
Lifecycle of Erythrocytes01:22

Lifecycle of Erythrocytes

Erythrocytes, also known as red blood cells, constantly move through blood capillaries. As a result, they damage their plasma membrane due to the continuous friction. Typically, after 100 to 120 days, erythrocytes become rigid and fragile as they wear out. As they pass through small vessels in the spleen and liver, they can get trapped and break apart into fragments.
The resident phagocytic macrophages deal with these damaged cells by engulfing them and separating their globin and heme groups.
Chronic Kidney Disease II: Clinical Manifestations01:24

Chronic Kidney Disease II: Clinical Manifestations

Chronic Kidney Disease (CKD) progressively impairs multiple body systems due to the accumulation of uremic toxins, which disrupt cellular functions across various organs.Neurologic symptomsNeurologic symptoms often arise early in CKD, as uremic toxin buildup drives changes in cognitive and motor functions. Patients frequently experience fatigue, headache, confusion, difficulty concentrating, and, in severe cases, seizures. Peripheral neuropathy commonly manifests as burning sensations in the...
Increased pulse rate01:17

Increased pulse rate

Tachycardia is a condition marked by an abnormally fast or irregular heart rate, surpassing the typical resting rate. In adults, tachycardia is characterized by a pulse rate ranging from 100 to 180 beats per minute. The increased heart rate can result in inadequate blood flow to various body parts, ultimately diminishing the oxygen supply to organs and tissues.
Many factors can elevate the risk of developing tachycardia. These include advanced age, a family history of arrhythmias, and an...
Cardiomyopathy IV: Restrictive Cardiomyopathy01:29

Cardiomyopathy IV: Restrictive Cardiomyopathy

Restrictive cardiomyopathy (RCM) is a rare heart muscle disease characterized by impaired ventricular filling due to stiffened ventricular walls, leading to significant diastolic dysfunction.EtiologyRestrictive cardiomyopathy can arise from both inherited and acquired diseases, many of which are systemic. It is categorized into four main types: infiltrative, storage, non-infiltrative, and endomyocardial diseases.Infiltrative diseases, such as amyloidosis, lead to RCM by depositing amyloid...

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Related Experiment Video

Updated: Jun 10, 2026

Characterization of Sickling During Controlled Automated Deoxygenation with Oxygen Gradient Ektacytometry
08:23

Characterization of Sickling During Controlled Automated Deoxygenation with Oxygen Gradient Ektacytometry

Published on: November 5, 2019

[Chorea revealing a polycytemia vera].

I Ben Ghorbel1, T Ben Salem, M Lamloum

  • 1Service de médecine interne, hôpital La Rabta, 1007 Tunis, Tunisia. benghorbelimed@yahoo.com

La Revue De Medecine Interne
|August 17, 2010
PubMed
Summary
This summary is machine-generated.

Chorea, an abnormal movement disorder, can be a key indicator of polycythemia vera (a blood disorder). Early diagnosis through blood tests in elderly patients is crucial for effective treatment and management.

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Area of Science:

  • Neurology
  • Hematology

Background:

  • Neurological symptoms are frequently observed in patients with polycythemia vera.
  • Chorea, a type of hyperkinetic movement disorder, is a rare but significant neurological manifestation.

Observation:

  • A 78-year-old male presented with headache and chorea.
  • Laboratory results revealed elevated hemoglobin (20 g/dL) and hematocrit (62.3%), indicating absolute erythrocytosis.
  • Genetic testing confirmed the presence of a JAK2 V617F mutation.

Findings:

  • The patient was diagnosed with polycythemia vera-associated chorea.
  • Treatment with therapeutic phlebotomy and hydroxyurea led to favorable clinical and biological outcomes.

Implications:

  • This case highlights the importance of considering polycythemia vera in elderly patients presenting with chorea.
  • A complete blood cell count is recommended for early detection of polycythemia vera in such cases.
  • Prompt diagnosis and management can significantly improve patient outcomes.