Osteochondritis Dissecans (OCD)

Osteochondritis Dissecans (OCD) is a joint condition in which a small segment of bone and the cartilage covering it loosens and separates from the bone underneath. It most often affects the knee, but it can also show up in the elbow or ankle. OCD is seen most commonly in adolescents and young adults.

Causes & Symptoms

The exact cause isn’t always clear (idiopathic), but the problem involves a loss of blood supply to a small area of bone. Without adequate blood flow, the bone tissue dies. Over time, this weakened piece of bone can pull away from the healthy bone around it. Repetitive trauma or high-impact activity appear to be major risk factors.

Symptoms most people will notice include:

• Pain: A deep, achy pain in the affected joint that gets worse with activity.
• Mechanical symptoms: If the loose fragment moves around inside the joint (a “loose body”), it can cause catching, locking, or clicking.
• Swelling: The knee may swell intermittently (off and on), especially after exercise.

Diagnosis & Treatment

X-rays can show whether a lesion is present, but an MRI is necessary to determine stability. It shows if the cartilage is still attached (stable) or if fluid is getting behind the fragment (unstable).

Treatment depends on the patient’s age and whether the lesion is stable or loose. Options include:

• Observation: In children with open growth plates, stable lesions often heal on their own with strict rest and crutches (non-weight bearing) for several months.
• Surgery: This is required for unstable lesions, loose fragments, or for adult patients. Surgical approaches include:
  • Fixation: Screwing or pinning the fragment back in place.
  • Grafting: Replacing the damaged area with a small piece of cartilage and bone (The most common being called the OATS procedure, but now there are many additional ways of inlaying new cartilage).
  • Drilling: To stimulate blood flow and healing, tiny holes are drilled into the bone.

Younger patients often have a good chance of healing, especially with early, appropriate treatment. However, untreated OCD can lead to arthritis and long-term joint problems.

Because the condition is idiopathic, prevention is difficult. Since repetitive stress on bones and joints is a suspected factor, managing sports strain, strengthening muscles, wearing protective gear, maintaining a healthy weight, warming up properly, resting, and avoiding pushing through pain might reduce risk.

Pain is the body’s way of saying something isn’t right. If you have joint pain that persists or worsens, contact a healthcare provider. Early diagnosis and treatment, with rest and activity modification, are crucial for healing, particularly before skeletal maturity.