Clinical features of primary ciliary dyskinesia. (A) Coronal computed tomography (CT) scan of a 17-year-old PCD individual showing diffuse pansinusitis with mucosal thickening and polyposis. (B) Endoscopic view showing nasal polyp (same patient). (C) Chest X-ray of a 6-year-old PCD individual with middle lobe atelectasis. Silhouetting of the right heart border is present. (D) Chest CT of a 6-year-old individual with situs inversus totalis. The left-sided middle lobe shows extensive bronchiectasis with volume loss (white arrow). In addition, consolidations and mucous impaction are present in the right upper lobe.