Had a lump for about a year which has got bigger over this time, it is situated at the top of my stomach, in the centre, just about where the CENTRE of my rib cage ends. I have been to a doctor who gave me a two minute examination and was told it was my bone?? I'm not sure as it can be sore and as I've said, it seems to be getting bigger. It is a solid lump and is under the skin. I have also found that when I have rubbed it, well, it makes me burp. Really worried at the moment, don't want to look silly going back for a second opinion if it is infact just my bone.