I have had lumps all over my body, for more than 30 years. They vary in size from a small pea to a silver dollar. They are called lipoma.
These lumps for you, for me, or for anyone could be a lot of different things other than cancer. Your doctor should be the best person to help you with this.
I won't worry about a lump near the surface of the skin, especially if it isn't growing. It could be anything...just have it checked out by your doctor.