Quadricuspid aortic valve quadricuspid aortic valve aortic valve cusp morphology phenotype quadricuspid aortic valve This phenotype grouping was automatically generated from an existing mapping.Its labels are generated by combining the labels of the phenotypes in the group, so they may look less ideal.HP:0031655 (Quadricuspid aortic valve), MP:0031538 (quadricuspid aortic valve)