Hi, 5 months ago i started noticing a painless lump on my arm which has grow alot over time. I have been visiting my doctor who referred me for an ultrasound scan the results came back unclear. Today I was sent to see a orthopedic specialist who has said he is also unsure what it could be and has said I need to get an MRI scan (which will be another few weeks before this comes through) i am worried incase it is somthing serious has anyone else experienced anything like this?