Primary ciliary dyskinesia-33 is an autosomal recessive disorder characterized by recurrent upper and lower respiratory infections due to defective ciliary clearance and resulting in chronic lung disease. Some patients may have recurrent ear infections resulting in conductive hearing impairment. Examination of respiratory cilia shows subtle movement defects. Laterality defects have not been reported (summary by {2:Olbrich et al., 2015}). For a phenotypic description and a discussion of genetic heterogeneity of primary ciliary dyskinesia, see CILD1 ({244400}).