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A member asked:
I have a ball in my knee for 4 years and it gets stuck i between my kneecap sometimes. what is this.
A doctor has provided 1 answer
You may have: a "loose body" within the joint space. There are a variety of causes. The intra-articular loose bodies are made of separated damaged bone, cartilage, or synovium. You should see your doctor for evaluation. If this is what it is, it could lead to cartilage damage and arthritis.
Answered 8/1/2014
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