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.

Cure Glomerulonephropathy Network (CureGN) is a multi-year study of 2,400 children and adults with four rare glomerular (kidney) diseases at over 50 centers in the US, Canada, and Italy. The purpose of CureGN is to create a patient research network to learn about four major causes of glomerular disease : 1. Minimal Change Disease (MCD) 2. Focal Segmental Glomerulosclerosis (FSGS) 3. Membranous Nephropathy (MN) 4. IgA Nephropathy (IgAN)

In this study, we are developing new magnetic resonance imaging (MRI) and ultrasound methods to determine if it is effective in diagnosing complication in kidney transplant patients. Participants in this study will involve patients that have had a kidney transplant and are scheduled for a kidney biopsy. The study will also involve a comparison group of healthy individuals that have no history of kidney conditions. Study procedures will include a review of medical history and medications, MRI scan and ultrasound of the abdomen and blood/ urine test.