Which of the following statements is wrong regarding adult polycystic kidney disease?

Autosomal Dominant (Adult) Polycystic Kidney Disease Hereditary disorder Multiple expanding cysts of both kidneys that leads to destruction of renal parenchyma. Bilateral. Gross appearance : The kidneys are bilaterally enlarged and weighs as much as 4 kg each. Microscopic examination: Functioning nephrons dispersed between the cysts. Individuals with polycystic kidney disease also tend to have extra-renal congenital anomalies. Mitral valve prolapse