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Osteoarthritis

This is an educational overview summarizing the definition, symptoms, risk factors, diagnosis, and management principles of osteoarthritis, along with the scope of evidence.

osteoarthritis · degenerative joint disease

MONDO:0005178Public QA completeSource-bound · 4

Disease at a glance

Start with the essentials, then explore the patient and research views.

Public revision · b2416f56e7c2

Disease category
Osteoarthritis is the most common arthritis in which the articular cartilage and surrounding structures of joints undergo degeneration, primarily occurring in the hands, knees, hips, and spine.
Core mechanism
A precise single cause has not been established, but factors such as age, joint injury or surgery, repetitive overuse, joint malalignment, weight burden, and family history may be involved.
Main causes · related factors
As articular cartilage becomes rough, thins, or is lost, the cushioning and gliding of bones decrease, and osteophytes along with inflammation and structural changes around the joint contribute to pain and functional decline.
Representative patterns
Representative features include joint pain during movement, stiffness after rest, swelling after use, decreased range of motion, and a sense of joint instability.
Individual differences
The likelihood of occurrence increases with age, particularly rising after middle age, and individual differences exist depending on past injury/surgery, repetitive loading, overweight, malalignment, and family history.
Diagnosis
Symptoms vary from person to person, and pain may not always correspond with imaging findings; while it generally worsens slowly, the course and impact on function vary.
Management
Diagnosis is based on confirming symptoms and medical history, physical examination, and supplemented by imaging tests such as X-rays and other tests to exclude other causes if necessary.
Treatment/Research Status
There is no single test to confirm osteoarthritis, and the degree of pain or functional decline should not be determined solely by structural changes on imaging.
Read Evidence
Management aims for pain relief and improvement in movement and function, combining exercise, strength and flexibility training, weight management if necessary, assistive devices, and adjustment of daily activities.
Key Precautions
Current treatment focuses on managing symptoms and function rather than completely eliminating the disease, and surgery may be considered if there is insufficient effect despite adequate non-surgical management.

For patients and families

A structured guide for understanding the disease and preparing for clinical conversations.

At a Glance

Osteoarthritis is the most common arthritis in which the articular cartilage and surrounding structures of joints undergo degeneration, primarily occurring in the hands, knees, hips, and spine.

Representative features include joint pain during movement, stiffness after rest, swelling after use, decreased range of motion, and a sense of joint instability.

How the disease works

A precise single cause has not been established, but factors such as age, joint injury or surgery, repetitive overuse, joint malalignment, weight burden, and family history may be involved.

As articular cartilage becomes rough, thins, or is lost, the cushioning and gliding of bones decrease, and osteophytes along with inflammation and structural changes around the joint contribute to pain and functional decline.

Variations in presentation among individuals

The likelihood of occurrence increases with age, particularly rising after middle age, and individual differences exist depending on past injury/surgery, repetitive loading, overweight, malalignment, and family history.

The broad framework of diagnosis and management

Symptoms vary from person to person, and pain may not always correspond with imaging findings; while it generally worsens slowly, the course and impact on function vary.

Diagnosis is based on confirming symptoms and medical history, physical examination, and supplemented by imaging tests such as X-rays and other tests to exclude other causes if necessary.

Current status of treatment

There is no single test to confirm osteoarthritis, and the degree of pain or functional decline should not be determined solely by structural changes on imaging.

Management aims for pain relief and improvement in movement and function, combining exercise, strength and flexibility training, weight management if necessary, assistive devices, and adjustment of daily activities.

Current treatment focuses on managing symptoms and function rather than completely eliminating the disease, and surgery may be considered if there is insufficient effect despite adequate non-surgical management.

How to read clinical trials

Clinical trial registration only means that a study exists and does not prove efficacy, approval, or standard of care. The packet records 1 completed observational study related to osteoarthritis, but results are not presented.

Points to verify during clinical consultations

In clinical practice, it is important to assess the location, duration, and triggers of pain, stiffness and functional limitations, past injuries or surgeries, changes in activity and weight, current treatments, and warning symptoms together.

Medical Guidance

This material is for educational purposes and is not intended as a guide for individual diagnosis or treatment. Please consult with medical professionals regarding symptoms or treatment decisions.

Evidence and sources

A trial registry status does not establish efficacy or regulatory approval.