The primary goal of this research study is to learn if patients with autosomal recessive polycystic kidney disease (ARPKD) are at risk for brain aneurysms or cardiovascular abnormalities.Participants in this study will involve patients that have a clinical diagnosis of ARPKD.The study will also involve a comparison group of healthy individuals that have no history of kidney or cardiac conditions.

The primary goal of this research study is to see if new types of magnetic resonance imaging (MRI) can be used to measure liver health in children with autosomal recessive polycystic kidney disease (ARPKD) compared to healthy controls. Both children with ARPKD and healthy children, aged 6 years and above can participate.