Renal Hypoplasia, Bilateral is related to papillorenal syndrome and oligomeganephronia. An important gene associated with Renal Hypoplasia, Bilateral is PAX2 (Paired Box 2), and among its related pathways/superpathways are Markers of kidney cell lineage and Development of ureteric collection system. Affiliated tissues include kidney, and related phenotypes are renal hypoplasia and hypertension