large lump on upper mid chest above breasts?

My fiance has a large lump above his breasts in the middle of where they would be if they were higher up. He had a cyst 2 years ago in the exact spot. He went to the hospital and they lanced it but they did it in the same spot they lanced the cyst from before. It looks just like it. They went deep but I dont think they went deep enough since it was scar tissue they cut into. It didnt need to be packed or stitches and scabbed over the next day. they said it was probably a clogged sweat gland. I think theyre full of crap because the cut itself looks fine but the lump looks infected. Any idea of what it could be or any opinion of if you think it is another cyst.