Interestingly, a recent study identified mutations in Nephronophthisis-4 (NPHP4), a cilia related gene, and linked them to a variety of cardiac laterality defects such as transposition of the great arteries (TGA), atrioventricular septal defects (AVSD), double outlet right ventricle (DORV), dextrocardia and abnormal pulmonary venous return. The gene discussed is NPHP4; the disease is Atrioventricular canal defect.