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Primary ciliary dyskinesia: diagnosis and standards of care
1Dept of Paediatric Respiratory Medicine, Imperial College of Medicine at National Heart and Lung Institute and Royal Brompton Hospital, London, UK.
Insights
Primary ciliary dyskinesia (PCD) is a genetic disorder affecting cilia, leading to respiratory issues and infertility. Early diagnosis and multidisciplinary management are crucial for good prognosis and preventing complications like bronchiectasis.
Area of Science:
- Medical Science
- Genetics
- Respiratory Medicine
Background:
- Primary ciliary dyskinesia (PCD) is a rare genetic disorder.
- It affects the respiratory tract and cilia function, leading to various health issues.
- Visceral situs inversus occurs in 50% of PCD cases.
Purpose of the Study:
- To review the clinical features, diagnosis, and management of Primary ciliary dyskinesia.
- To highlight the importance of early and accurate diagnosis.
- To emphasize the need for multidisciplinary care.
Main Methods:
- Diagnostic cascade including saccharin test, light microscopy for ciliary beat analysis, and electron microscopy for ultrastructural assessment.
- Measurement of nasal nitric oxide levels as a potential screening tool.
- Distinguishing primary ciliary abnormalities from secondary ones.
Main Results:
- PCD presents with neonatal respiratory distress, recurrent infections, chronic rhinosinusitis, and male infertility.
- Low nasal nitric oxide levels are characteristic of PCD.
- PCD should be considered in differential diagnoses for bronchiectasis, asthma, and severe upper airway disease.
Conclusions:
- Accurate diagnosis of PCD is vital to prevent bronchiectasis and unnecessary procedures.
- Management requires a multidisciplinary approach involving various specialists.
- Prognosis is favorable with appropriate management, but morbidity can be significant if mismanaged.
Abstract:
Primary ciliary dyskinesia (PCD) is characterized by disease of the upper and lower respiratory tract, in association with visceral mirror image arrangement in 50% of cases, due to abnormal structure and/or function of cilia. The purpose of this paper is to review the clinical features, diagnosis and management of PCD. Presentations include neonatal respiratory distress, recurrent lower respiratory tract infection, chronic rhinosinusitis and male infertility. PCD enters the differential diagnosis of bronchiectasis, atypical asthma, and unusually severe upper airway disease. Diagnosis is by a cascade of investigations, starting with the saccharin test in patients older than 10 yrs; ciliary beat frequency and pattern on light microscopy; and electron microscopy to assess ciliary morphology and orientation. It is important not to confuse primary and secondary ciliary abnormalities. Nasal nitric oxide is low in PCD, and this measurement shows promise as a screening test for PCD. Diagnosis is important, in order to prevent the development of bronchiectasis and to avoid any unnecessary otorhinolaryngological procedures. Regular follow-up is essential, and management should be multidisciplinary, with input from centres with a special interest in PCD, having access to paediatric and adult chest physicians, otolaryngologists and audiological physicians, physiotherapists, counselling services and fertility clinics. The prognosis is good, but morbidity can be considerable if PCD is incorrectly managed.