Any renal agenesis in which the cause of the disease is a mutation in the FGF20 gene. The disease is Monarch Disease Ontology id MONDO_0014319 (renal hypodysplasia/aplasia 2). Also known as: FGF20 renal agenesis (disease), renal agenesis (disease) caused by mutation in FGF20, renal hypodysplasia/aplasia type 2.