Anterior cruciate ligament injury

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Anterior cruciate ligament injury
File:Knee diagram.svg
Synonyms ACL injury, ACL tear
Pronounce N/A
Specialty Orthopedic surgery
Symptoms Knee pain, knee instability, swelling
Complications N/A
Onset Sudden
Duration Varies
Types N/A
Causes Trauma, sports injury
Risks Athletic activity, contact sports, previous injury
Diagnosis Physical examination, MRI
Differential diagnosis Meniscus tear, collateral ligament injury
Prevention Strength training, neuromuscular training
Treatment Rest, physical therapy, surgery
Medication N/A
Prognosis Generally good with treatment
Frequency Common in athletes
Deaths N/A


The Anterior Cruciate Ligament (ACL) is one of the key ligaments that help stabilize the knee joint. ACL injuries are among the most common knee injuries, especially in athletes who participate in high demand sports like soccer, football, and basketball. ACL injuries can range from mild (such as small tears/sprains) to severe (complete tears). The severity of the injury dictates the treatment and recovery process.

Causes[edit]

ACL injuries are most commonly caused by:

  • Sudden stops or changes in direction
  • Jumping and landing incorrectly
  • Direct collision, such as during a football tackle

Symptoms[edit]

Symptoms of an ACL injury include:

  • A loud "pop" or a "popping" sensation in the knee
  • Severe pain and inability to continue activity
  • Rapid swelling
  • Loss of range of motion
  • A feeling of instability or "giving way" with weight bearing

Diagnosis[edit]

Diagnosis of an ACL injury involves a physical examination and often imaging tests such as:

Treatment[edit]

Treatment options vary depending on the severity of the injury and the patient's needs. They include:

  • Non-surgical treatment: Rehabilitation exercises and physical therapy to strengthen the muscles around the knee.
  • Surgical treatment: ACL reconstruction surgery to replace the torn ligament with a piece of tendon from another part of the body or a donor.

Recovery[edit]

Recovery from an ACL injury can take several months. A combination of physical therapy, rehabilitation exercises, and, if necessary, surgery, can help an individual return to normal activities.

Prevention[edit]

Preventive measures include:

  • Strengthening leg muscles
  • Proper training and exercise techniques
  • Using proper sports equipment

Anterior_cruciate_ligament_injury images[edit]

See Also[edit]

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