MONDO_0016575 (primary ciliary dyskinesia) is a rare, genetically heterogeneous, primarily respiratory disorder characterized by chronic upper and lower respiratory tract disease. Approximately half of PCD patients have an organ laterality defect (situs inversus totalis or situs ambiguus/heterotaxy). Also known as: Kartagener syndrome, Kartagener's syndrome, PCD, ciliary motility disorder, immotile ciliary syndrome.