<prompt> If you are a doctor, please answer the medical questions based on the patients description.I have 2 lumps on the outside of my right knee. It doesnt hurt to the touch and it gets bigger every now and again. I have had to have knee surgery before, I hyper extended my knee backwards when I was younger. I have had these lumps for awhile now. Im 42 yr old male.  <response>: Hi. Thanks for your query and an elucidated history. These lumps look to be of synovial membrane which covers the joint and gives the joint the fluid to keep it friction-less origin. This is confirmed by your history of the swellings getting bigger and smaller on its own. This can be confirmed by MRI FNAC- fine needle aspiration cytology. If the swellings are not having any symptoms, you can watch team. Surgery to remove for getting rid of the disease and to get a histopathological diagnosis can be done. 