Conversation: The conversation between human and AI assistant.
[|Human|] I had surgery on my knee about four years ago. The skin behind my knee-cap broke and was irritating it. Now I have a ball of some sort on the side that I can move around anywhere in my knee. It doesn t seem to be attached to anything. It s just a loose body of something. What is this?
[|AI|]  Hi! Thanks for sharing your health queries with Chat Doctor! Well, this is a common post-surgical condition and whenever somebody presents to me like this, I consider the following possibilities:1. An inclusion cyst2. A post-operative stromal nodule inflamed chronically3. Lose bodied like fragments of bone/cartilage!4. Blood-filled sac termed as hematoma Overall, this is a benign or inflammatory or degenerative condition and not to worry at all!Therefore, kindly consult your surgeon for some tests like x-ray, CT scan and FNAC to determine the line of management! Hope got the answer to your question; please don't hesitate to write to me in case any more queries/clarifications. Wishing you good health!