Ciliary Dyskinesia, Primary, 18, also known as primary ciliary dyskinesia 18, is related to primary ciliary dyskinesia. An important gene associated with Ciliary Dyskinesia, Primary, 18 is DNAAF5 (Dynein Axonemal Assembly Factor 5). Affiliated tissues include testis and lung, and related phenotypes are decreased nasal nitric oxide and absent outer dynein arms