I have an egg-sized lump in the middle of my chest that my doctor says is a lipoma. He says he has seen these before in other locations and did not believe treatment was necessary. It wasn't painful at all for a couple weeks. But it is becoming more tender and other parts of my chest (particularly my left side between the chest cavity and the breast) are sore. Am wondering is this a normal diagnosis or should there be an x-ray or something?