I am an 18 year old female. About two months ago I located a lump in my left thigh that was on the muscle and moveable. It feels hard, yet rubbery. When I press on it, it feels like a bruise of a knot. I am very concerned about it. You cannot see it if my legs are straight, but when my leg is bent it I can feel and see it. It is smooth feeling and the lump is rounded. I have trouble sitting with my legs crossed as it tugs on my knee. As for seeing a doctor I was sent for an ultrasound which came back inconclusive and I am being sent for an MRI which will most likely result in a biopsy. My doctor said muscle cancer is VERY rare and that she can my guarantee anything. If anyone could give some sort of advice or input I would appreciate it greatly. I cannot stop crying.