I just started to do a little research about a lump that is small, hard, round in shape, approximately .5 in diameter and roughly 5 1/2 above my elbow embedded in the side of my bicep. It doesn t seem to move and there is only a slight amount of tenderness when lightly brushing against the skin covering it. I ve found in my short time reading, prior to stumbling on to this site, that it may be a lipoma or sarcoma. My question is what are the causes, seriousness, procedure in diagnosing and treating of both lipoma and sarcoma, as well as are there any other possible diagnoses it could be? Thank you for your time. Leaah