A Human Polycystic Kidney (IMAGE) University of California - Santa Barbara Caption A human polycystic kidney can grow to the size of a regulation size football. A normal kidney is the size of a fist. Credit Courtesy of the Indiana University School of Medicine - See more at: <a href="http://www.news.ucsb.edu/2015/015527/delivering-drugs-right-place#sthash.Lfe8IEKm.dpuf" target="_blank">http://www.news.ucsb.edu/2015/015527/delivering-drugs-right-place#sthash.Lfe8IEKm.dpuf</a> Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.