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Bone Disorders01:29

Bone Disorders

Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
Disorders of Hemostasis01:24

Disorders of Hemostasis

Hemostasis, the process that stops bleeding after a blood vessel injury, is crucial for maintaining the integrity of the circulatory system. However, disorders of hemostasis can disrupt this delicate balance, leading to either excessive clotting or bleeding. These disorders can be broadly classified into thromboembolic disorders and bleeding disorders.
Thromboembolic Disorders
Two factors primarily cause thromboembolic conditions.
Endocarditis II: Clinical Features of Infective Endocarditis01:25

Endocarditis II: Clinical Features of Infective Endocarditis

Endocarditis can present various clinical features depending on the causative organism and the patient's underlying health conditions. Initially, the clinical features of infective endocarditis develop gradually, presenting with nonspecific symptoms that can be easily mistaken for other illnesses.General SymptomsEarly symptoms of infective endocarditis are fever, chills, weakness, malaise, fatigue, and weight loss. These symptoms reflect the systemic nature of the infection and the body's...
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...
Inflammatory Bowel Disease II: Crohn's Disease01:30

Inflammatory Bowel Disease II: Crohn's Disease

Introduction
Inflammatory bowel disease, commonly known as IBD, refers to a collection of disorders that lead to persistent inflammation of the gastrointestinal tract. The two types of IBD are ulcerative colitis, which impacts the colon, and Crohn's disease, which can involve any part of the gastrointestinal segment.
Crohn's disease
Crohn's disease is a chronic, systemic inflammatory bowel disease (IBD) that predominantly affects the gastrointestinal tract. It is marked by transmural...
Inborn Errors of Metabolism01:20

Inborn Errors of Metabolism

Phenylketonuria (PKU) is a protein metabolism disorder characterized by high blood levels of the amino acid phenylalanine. This results from a mutation in the gene responsible for phenylalanine hydroxylase, an enzyme that converts phenylalanine into tyrosine. When this enzyme is deficient, phenylalanine builds up in the blood, leading to symptoms such as vomiting, rashes, seizures, growth deficiency, and severe mental retardation. An early diagnosis and a diet restricting phenylalanine intake...

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Related Experiment Videos

Kienbock's disease.

Shaun J O'Laughlin1

  • 1Third Brigade Fourth Infantry Division , Fort Carson, CO, USA.

The Journal of Orthopaedic and Sports Physical Therapy
|June 1, 2010
PubMed
Summary

A 53-year-old male experienced right wrist pain due to Kienböck's disease, characterized by osteonecrosis of the lunate. Treatment involved a radial shortening osteotomy to alleviate pressure and prevent further bone damage.

Area of Science:

  • Orthopedic Surgery
  • Radiology
  • Sports Medicine

Background:

  • Kienböck's disease, or osteonecrosis of the lunate, is a condition causing wrist pain and dysfunction.
  • Ulnar variance, an imbalance in the lengths of the radius and ulna, is a known risk factor for Kienböck's disease.
  • Repetitive wrist trauma, such as from skiing or mountain biking, can contribute to the development of lunate osteonecrosis.

Observation:

  • A 53-year-old male presented with insidious onset right wrist pain.
  • Radiographic and MRI findings confirmed ulnar variance and osteonecrosis of the lunate (Kienböck's disease).
  • The patient reported a history of multiple falls during recreational activities.

Findings:

  • The patient's symptoms and imaging results were consistent with Kienböck's disease.

Related Experiment Videos

  • Ulnar variance was identified as a potential contributing factor to the lunate's compromised blood supply.
  • Surgical intervention was deemed necessary to address the condition.
  • Implications:

    • A radial shortening osteotomy was performed to reduce compressive forces on the lunate.
    • This surgical approach aims to prevent further fragmentation and collapse of the lunate bone.
    • Successful management of Kienböck's disease can restore wrist function and alleviate pain.