I first reported I had a mass on the lateral side of my right knee. Had an xray and the dr. said it was some tiny bone that only 10% of population has. This made no sense to me and he said it is located in the gastroc but moved up my leg. I have no pain at all except when i run it swells. I have no insurance so mri is out of the question. Any ideas what this is? Has not changed size in 2 months