Ciliary Dyskinesia, Primary, 28, also known as primary ciliary dyskinesia 28, is related to epilepsy, nocturnal frontal lobe, 5 and ciliary dyskinesia, primary, 36, x-linked. An important gene associated with Ciliary Dyskinesia, Primary, 28 is SPAG1 (Sperm Associated Antigen 1). Affiliated tissues include testis and lung, and related phenotypes are decreased nasal nitric oxide and dynein arm defect of respiratory motile cilia