
Osteochondritis Dissecans (OCD of the Knee)
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Osteochondritis dissecans (OCD) of the knee is a joint condition where a small section of bone and its overlying cartilage lose blood supply. Over time, this piece may loosen, causing pain, swelling, and joint instability. OCD most often affects adolescents and young athletes, especially those involved in high-impact sports. If untreated, it can lead to early arthritis or long-term knee damage.
Diagonosis of OCD
Diagnosis typically includes:
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Medical history review (sports activity, pain progression, or prior knee injury).
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Physical exam to check for tenderness, swelling, or joint stiffness.
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Imaging tests:
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X-rays to identify bone changes.
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MRI to assess lesion size, cartilage health, and stability.
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CT scan in advanced cases for surgical planning.
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Treatment for OCD
Treatment depends on the severity and stability of the lesion, as well as the patient’s age. Physical therapy plays a key role in recovery by restoring strength and mobility. Therapy may include:
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Activity modification — limiting high-impact sports until healing occurs
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Manual therapy to improve joint mobility and reduce stiffness
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Strengthening exercises for the quadriceps, hamstrings, and hip stabilizers
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Balance and proprioception training to improve knee control
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Pain management with ice, heat, or electrical stimulation
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Education on safe return-to-sport and long-term joint protection
Surgery may be needed if the lesion is large, unstable, or does not respond to conservative treatment. PT is essential both before and after surgery.
Symptoms of OCD
Signs and symptoms of OCD in the knee may include:
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Aching or sharp pain in the knee, often after activity
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Swelling or tenderness around the joint
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Stiffness and reduced range of motion
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Clicking, grinding, or locking sensations
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Knee instability or the feeling it may “give out”
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Symptoms that worsen with running, jumping, or prolonged activity
Prevention of OCD
To lower the risk of OCD or slow progression:
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Avoid repetitive high-impact activity without proper rest
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Strengthen leg and hip muscles to support joint stability
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Maintain flexibility in hamstrings, calves, and quadriceps
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Use proper technique in sports and training
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Address knee pain early instead of pushing through symptoms
