The Lemonade Stand

Polycystic kidney disease (PKD) is a genetic disorder characterized by the growth of numerous cysts in the kidneys. When cysts form in the kidneys, they are filled with fluid. PKD cysts can profoundly enlarge the kidneys while replacing much of the normal structure, resulting in reduced kidney function and leading to kidney failure. When PKD causes kidneys to fail—which usually happens after many years—the patient requires dialysis or kidney transplantation. About one-half of people with the most common type of PKD progress to kidney failure, also called end-stage renal disease (ESRD). In the United States, about 600,0001 people have PKD, and cystic disease is the fourth leading cause of kidney failure. Two major inherited forms of PKD exist: 1 Grantham JJ, Nair V, Winklhoffer F. Cystic diseases of the kidney. In: Brenner BM, ed. Brenner & Rector’s The Kidney. Vol. 2. 6th ed. Philadelphia: WB Saunders Company; 2000: 1699–1730.