My husband had just such a lump in his calf. We feared cancer, but his surgeon assured us that had it been cancer, he would have been in severe pain. The surgeon thought it would prove to be a benign tumor, but when surgery was actually performed later, it turned out to be a large blood clot -- probably stemming from some injury to that part of his leg that he had long since forgotten about.

A possibility for you?

It was easy to remove, and the only worry was what would have happened had it started to break up -- which thank God it hadn't.