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Knee Injuries and Disorders

Summary

Your knee joint is made up of bone, cartilage, ligaments and fluid. Muscles and tendons help the knee joint move. When any of these structures is hurt or diseased, you have knee problems. Knee problems can cause pain and difficulty walking.

Knee problems are very common, and they occur in people of all ages. Knee problems can interfere with many things, from participation in sports to simply getting up from a chair and walking. This can have a big impact on your life.

The most common disease affecting the knee is osteoarthritis. The cartilage in the knee gradually wears away, causing pain and swelling.

Injuries to ligaments and tendons also cause knee problems. A common injury is to the anterior cruciate ligament (ACL). You usually injure your ACL by a sudden twisting motion. ACL and other knee injuries are common sports injuries.

Treatment of knee problems depends on the cause. In some cases your doctor may recommend knee replacement.

NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases

Start Here

Knee Problems (American Academy of Family Physicians) Also in Spanish

Diagnosis and Tests

Direct Arthrography  (American College of Radiology; Radiological Society of North America) Also in Spanish

Knee Problems (American Academy of Family Physicians) Also in Spanish

Magnetic Resonance Imaging (MRI) – Knee (American College of Radiology; Radiological Society of North America) Also in Spanish

X-Ray Exam: Knee (Nemours Foundation)

Treatments and Therapies

ACL Reconstruction (Mayo Foundation for Medical Education and Research)

Knee Arthroscopy (American Academy of Orthopaedic Surgeons)

Knee Replacement: MedlinePlus Health Topic  (National Library of Medicine) Also in Spanish

Living With

Knee Bracing: What Works?(American Academy of Family Physicians) Also in Spanish

Knee Rehabilitation Exercises(American Academy of Orthopaedic Surgeons)

Mobility Aids: MedlinePlus Health Topic  (National Library of Medicine) Also in Spanish

Specifics

ACL Injuries (American Academy of Family Physicians)

Baker Cyst (Mayo Foundation for Medical Education and Research)

Osteochondritis Dissecans (OCD)(American Academy of Family Physicians) Also in Spanish

Patellar Tendinitis (Mayo Foundation for Medical Education and Research) Also in Spanish

Patellofemoral Pain Syndrome(American Academy of Family Physicians) Also in Spanish

Pigmented Villonodular Synovitis (PVNS) (American Academy of Family Physicians) Also in Spanish

Posterior Cruciate Ligament (PCL) Injury (Cleveland Clinic Foundation)

Swollen Knee (Water on the Knee)(Mayo Foundation for Medical Education and Research) Also in Spanish

Images

Anterior cruciate ligament repair – slideshow (Medical Encyclopedia) Also in Spanish

Knee arthroscopy – slideshow(Medical Encyclopedia) Also in SpanishTibial osteotomy – slideshow (Medical Encyclopedia) Also in Spanish

Clinical Trials

ClinicalTrials.gov: Anterior Cruciate Ligament (ACL) Injuries  (National Institutes of Health)

ClinicalTrials.gov: Anterior Cruciate Ligament Reconstruction  (National Institutes of Health)

ClinicalTrials.gov: Articular Cartilage Disorders  (National Institutes of Health)

ClinicalTrials.gov: Knee Injuries  (National Institutes of Health)

ClinicalTrials.gov: Menisci, Tibial  (National Institutes of Health)

ClinicalTrials.gov: Patella Disorders  (National Institutes of Health)

Journal Articles

References and abstracts from MEDLINE/PubMed (National Library of Medicine)

Article: The Role of Lateral Retinacular Release in Preventing Patellofemoral Malalignment in…

Article: Rehabilitation versus surgical reconstruction for non-acute anterior cruciate ligament injury (ACL…

Article: Clinical outcomes in stump-preserving versus stump-sacrificing anterior cruciate ligament reconstruction; a…

Knee Injuries and Disorders — see more articles

Find an Expert

Find a Doctor in American Association of Hip and Knee Surgeons(American Association of Hip and Knee Surgeons)

National Institute of Arthritis and Musculoskeletal and Skin Diseases  Also in Spanish

Children

Osgood-Schlatter Disease (For Parents) (Nemours Foundation) Also in Spanish

Osteochondritis Dissecans (For Parents) (Nemours Foundation)

Teenagers

Anterior Cruciate Ligament (ACL) Injuries (Nemours Foundation) Also in Spanish

Jumper’s Knee (Nemours Foundation) Also in Spanish

Knee Injuries (Nemours Foundation) Also in Spanish

Medial Collateral Ligament (MCL) Injuries (Nemours Foundation)

Meniscus Tears (Nemours Foundation)

Osgood-Schlatter Disease (American Academy of Family Physicians) Also in Spanish

Osgood-Schlatter Disease (Nemours Foundation) Also in Spanish

Runner’s Knee (Nemours Foundation) Also in Spanish

Patient Handouts

ACL reconstruction (Medical Encyclopedia) Also in Spanish

Anterior crucate ligament (ACL) injury (Medical Encyclopedia) Also in Spanish

Anterior cruciate ligament (ACL) injury — aftercare (Medical Encyclopedia) Also in Spanish

Anterior knee pain (Medical Encyclopedia) Also in Spanish

Baker cyst (Medical Encyclopedia) Also in Spanish

Broken kneecap – aftercare (Medical Encyclopedia) Also in Spanish

Collateral ligament (CL) injury — aftercare (Medical Encyclopedia) Also in Spanish

Getting your home ready – knee or hip surgery (Medical Encyclopedia) Also in Spanish

Knee arthroscopy (Medical Encyclopedia) Also in Spanish

Knee MRI scan (Medical Encyclopedia) Also in Spanish

Knee pain (Medical Encyclopedia) Also in Spanish

Meniscus tears — aftercare (Medical Encyclopedia) Also in Spanish

Osgood-Schlatter disease (Medical Encyclopedia) Also in Spanish

MEDICAL ENCYCLOPEDIA

ACL reconstruction

ACL reconstruction – discharge

Anterior crucate ligament (ACL) injury

Anterior cruciate ligament (ACL) injury — aftercare

Anterior cruciate ligament repair – slideshow

Anterior knee pain

Baker cyst

Broken kneecap – aftercare

Collateral ligament (CL) injury — aftercare

Getting your home ready – knee or hip surgery

Related Health Topics

Knee Replacement

Leg Injuries and Disorders

National Institutes of Health

The primary NIH organization for research on Knee Injuries and Disorders is the National Institute of Arthritis and Musculoskeletal and Skin Diseases

Disclaimers

MedlinePlus links to health information from the National Institutes of Health and other federal government agencies. MedlinePlus also links to health information from non-government Web sites. See our disclaimer about external links and our quality guidelines.

The information on this site should not be used as a substitute for professional medical care or advice. Contact a health care provider if you have questions about your health.

Original Article – https://medlineplus.gov/kneeinjuriesanddisorders.html

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