Specific Aims: Our question is: if we are removing non-functional tissue (tumor) then why is there a loss in renal volume (15%) and function (10%)? We hypothesize that by omitting one particular step during surgery, sewing closed the defect caused by tumor removal, we will be able to improve renal volume loss and function (RENORRHAPHY CLIP http://youtu.be/NXOtUHdigj4). Indiana University is in a unique position to study this hypothesis as two of our surgeons have routinely omitted closing the defect left after tumor removal (NO RENORRHAPHY CLIP http://youtu.be/ZisMjrm85s8).