I apologize for any missing links or incomplete data. Locations of Friends groups. PKD is a genetically passed disease which displaces healthy kidney tissue with fluid-filled cysts. The progressive enlargement of these innumerable cysts on the kidneys crowd out normal kidney tissue, eventually causing renal dysfunction. Because the kidney's function is to remove waste products from the body, PKD causes the body to become poisoned by its own waste products.
Individual cysts can enlarge to the size of hen's eggs or even baseballs.
Cysts are not limited to just the kidneys, but also can develop in the liver and pancreas.