Hi I have what I was told is a ganglion cyst on the back of my thigh, just above my knee. I noticed it about 6 months ago a few months after I pulled a muscle. Then, a few months ago I ve noticed the whole muscle has started to feel lumpy all the way up the back of my thigh. There is no pain unless sometimes when I walk a lot on it. Are these related? Is it something I need to see a doctor about?