REN and Bartter disease type 4A: RMND1 mutations should also be considered as an important differential diagnosis to other inherited renal diseases, such as recessive Bartter syndrome type 4A (OMIM #602522) or dominant Familial Juvenile Hyperuricemic Nephropathy Type 2 caused by dominant mutations in REN (PMID: 19664745) (OMIM #613092).