A lateral collateral ligament sprain occurs when the ligament on the outer side of the knee tears. This type of sprain is most common in people who play contact sports, such as football.
While knee injuries represent up to 39 percent of all injuries in athletes, lateral ligament injuries are less common. Many lateral collateral ligament (LCL) injuries occur alongside other knee damage.
The LCL connects the thigh bone to the smaller calf bone. It controls the sideways movement of the knee, and, alongside the medial collateral ligament on the inner knee, it contributes to knee stability. An LCL sprain usually occurs when the knee pushes out beyond the usual range of motion. This overstretches and tears the ligament.
The most obvious symptom is pain, which may be mild or severe, on the outer side of the knee. People sometimes hear a snapping or tearing sound when the injury occurs. Other symptoms include: bruising to the skin, general weakness in the knee joint and a feeling that it may give way, numbness in the knee, which may occur due to damage to nerves, stiffness, swelling along the outside of the knee, tenderness around the ligament, especially if with pressure, the sensation that the knee is locking during movement
The severity of symptoms depends on the seriousness of the sprain. Doctors categorize LCL sprains as:
Grade 1: The ligament overstretches but does not tear. It can result in mild pain or swelling. A grade 1 sprain does not usually affect joint stability.
Grade 2: The knee ligament partially tears. Symptoms can include moderate pain, swelling, knee instability, and difficulty using the joint. The skin around the LCL ligament may bruise.
Grade 3: This involves a complete ligament tear. Symptoms include swelling, significant bruising, joint instability, and difficulty putting weight on the leg. A grade 3 sprain increases the risk of injury to other parts of the knee and leg.
People with symptoms of a knee injury should see a doctor for diagnosis and treatment. They will typically ask about symptoms and perform a physical examination. They will look for the following around the LCL: pain, swelling, tenderness and instability. They will also compare the injured knee with the other knee. The doctor may use imaging tests to confirm the diagnosis, including MRI. According to the University of California, San Francisco, MRI scanning is more than 90 percent accurate in evaluating LCL injury severity.
Treatments for LCL sprains depend on the severity and presence of other knee damage.
To treat an LCL sprain, people can try the following treatments: Rest the knee, apply ice, over-the-counter anti-inflammatory medications and/or use a knee support.
Physical therapy, a program of stretching and strengthening exercises can help people with moderate to severe sprains. Grade 3 sprains may require surgery to repair the tear in the ligament. Surgery is more common in people who have other knee injuries alongside the LCL sprain.
This information is fairly accurate. I would add that a grade 1 sprain occurs at the origin or insertion of the ligament into the bone. A grade 2 sprain is in the middle of the ligament. Microscopically, it would look like Swiss cheese, with little micro-tears.
I use omega-3 fatty acids, Turmeric, or ginger as an anti-inflammatory rather than the OTC drugs. I would also add high doses of MSM, glucose or chondroitin sulfate to speed repair of the ligament.
Have your injured knee evaluated by a qualified physician but look to avoid surgery unless it’s a grade 3 sprain. Even then, depending on age and activity, surgery may not be necessary or helpful. Give conservative care including manipulation, physical therapy, and nutritional supplementation several weeks before judging the outcome.
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