ciliary dysfunction bronchiectasis (EFO_0920040) is a bronchiectasis endotype characterized by ciliary dysfunction that does not meet full diagnostic criteria for primary ciliary dyskinesia (PCD), typically presenting with abnormally low nasal nitric oxide levels, ciliary beat frequency abnormalities, and impaired mucociliary clearance. This endotype represents a spectrum of ciliopathy-associated bronchiectasis distinct from classical PCD. Also known as: ciliary-predominant bronchiectasis.