What are the differences between acquired cystic kidney disease and polycystic kidney disease?

People with Polycystic Kidney Disease
are born with a gene that causes the disease
have enlarged kidneys
develop cysts in the liver and other parts of the body.
     &
People with Acquired Cystic Kidney Disease
do not have a disease-causing gene
have kidneys that are normal-sized or smaller
do not form cysts in other parts of the body