My mother had a car wreck 2 years ago. They had to cut an incision in her back for surgery. All of her ribs on the right side were shattered. She now has a large hard lump on the lower front side of her stomach area right above her right hip on the front side. Any idea what this could be? She s had it ever since she was released from the hospital. You could take a sheet copy paper and it would be a good example of the surface area the lump covers.