Polycystic kidney disease (PKD) is a genetic disease (passed from an affected parent to their child) causing uncontrolled growth of cysts in the kidney eventually leading to kidney failure. It affects all racial and ethnic groups equally.
There are two types of PKD: autosomal dominant (ADPKD) and autosomal recessive (ARPKD). ADPKD is the more common type and affects more than 600,000 Americans and 14.2 million people worldwide. ARPKD is a rare form of the disease that occurs in 1 in 20,000 children worldwide.
A typical kidney is the size of a human fist and weighs about a third of a pound. PKD kidneys can be much larger, some growing as large as a football, and weighing up to 30 pounds each. The number of cysts can range from just a few to many. The size of the cysts can range from a pinhead to as large as a grapefruit. Although the primary sign of PKD is cysts in the kidneys, there are other symptoms that can occur in various areas of the body.