An osteochondroma is a formation of extra bone and cartilage that can develop in various parts of the body. In the knee/leg, it most commonly occurs around the femur, but can develop in any metaphysis of long bones. This non-cancerous tumor is often asymptomatic, or it may cause pain and discomfort as the surrounding muscle and soft tissue may catch or rub during
activity.
Frequent Signs and Symptoms
Often there is no pain with this condition and it is detected when x-rays are taken for other reasons. Other times, symptoms can include the following:
- Tenderness over the osteochondroma
- Knee pain with motion
- Visible or palpable lump under the skin
- Occasionally numbness and tingling
- “Snapping” sensation as muscle tendons move over the osteochondroma
- Pain with swelling if the Osteochondroma has fractured