Lump on my right rib in the back what is it?

Lump: Ideally, this is to be looked at before a final diagnosis is made. out of benign causes a fat lump or a an oil filled cyst are probably the most common ones.

Not enough informati: We do not have enough information to tell you what this lump on the right rib could be without more details and possible examination It can be anywhere from a fatty tumor called lipoma,a cyst,a bony tumor or any other thing I suggest you have it checked by your doctor