If i ask you what is the highest number of kidney in human being what will your answer be? 2? 3? But those are just small numbers as a man named BJÖRN VAN EMPEL in NETHERLANDS (ROOSENDAAL) has the Guinness World Record for 7 kidneys. He ended up with 7 kidneys as after a surgery, removing the old kidneys is very risky and should not be done unless there is uncontrolled infection, high blood pressure, or the kidneys are markedly enlarged such as with polycystic kidney disease (PKD). It is uncommon for us to recommend removal of native kidneys prior to kidney transplant.