Ciliary Dysfunction (Kartagener Syndrome, Primary Ciliary Dyskinesia)


Article Author:
Brittany Stern


Article Editor:
Girish Sharma


Editors In Chief:
Stephen Leslie
Karim Hamawy


Managing Editors:
Avais Raja
Orawan Chaigasame
Carrie Smith
Abdul Waheed
Khalid Alsayouri
Trevor Nezwek
Radia Jamil
Patrick Le
Anoosh Zafar Gondal
Saad Nazir
William Gossman
Hassam Zulfiqar
Steve Bhimji
John Shell
Matthew Varacallo
Heba Mahdy
Ahmad Malik
Sarosh Vaqar
Mark Pellegrini
James Hughes
Beata Beatty
Nazia Sadiq
Hajira Basit
Phillip Hynes
Tehmina Warsi


Updated:
3/1/2019 9:23:33 AM

Introduction

Primary ciliary dyskinesia (PCD), formerly known as immotile cilia syndrome,  is a disorder of motile cilia structure and function that results in chronic oto-sinopulmonary disease. Primary ciliary dyskinesia typically presents with respiratory distress in infants, early onset year-round cough, and nasal congestion. Primary ciliary dyskinesia diagnosis is challenging given lack of a single diagnostic test and the multitude of conditions that result in similar symptoms. Kartagener syndrome is a triad of chronic sinusitis, bronchiectasis, and situs inversus resulting from ciliary dyskinesia.[1][2][3][4]

Etiology

Primary ciliary dyskinesia is a genetic disorder with abnormal ciliary ultrastructure and movement. There are currently 33 known genes associated with primary ciliary dyskinesia, with the majority following autosomal recessive inheritance. DNAI1 and DNAH5, which encode for components of the outer dynein arm complex in cilia, are the two most common genes associated with PCD. Two rare X-linked genes, RPGR and OFD1, have also been identified. 

Epidemiology

Reported prevalence is approximately 1:15,000 live births. Given difficulties in diagnosing primary ciliary dyskinesia, misdiagnosis is common, and therefore primary ciliary dyskinesia may be more prevalent than reported.

Pathophysiology

Cilia are hair-like attachments on epithelial cell surfaces of the cells lining the nasopharynx, lower respiratory tract, paranasal sinuses, middle ear, and reproductive tract. In primary ciliary dyskinesia, mutations in genes encoding for axonemal structures of motile cilia result in cilia that are abnormal in structure and function. Defects in primary ciliary dyskinesia can include outer dynein arm defects, inner dynein arm defects, central microtubular abnormalities, radial spoke defects and outer ultrastructural abnormalities (Figure). In the respiratory tract, abnormal ciliary movements cause impaired mucociliary clearance that results in recurrent and chronic oto-sinopulmonary infections. The sperm tail and fimbriae of fallopian tubes also have motile cilia. Therefore male and female infertility often occurs in primary ciliary dyskinesia patients. Situs abnormalities are also common as the defect in motile cilia during embryogenesis results in abnormal thoracoabdominal orientation. Situs inversus occurs in 50% of cases of primary ciliary dyskinesia, since normal ciliary movement needed for the visceral rotation, in the absence of normal ciliary function during embryogenesis, becomes a chance occurrence. Kartagener syndrome is a triad of chronic sinusitis, bronchiectasis, and situs inversus resulting from ciliary dyskinesia.[5][6][7][8]

History and Physical

The majority of newborns with primary ciliary dyskinesia develop neonatal respiratory distress with atelectasis on chest radiographs. Unlike other causes of respiratory distress in newborns, which occurs in the first few hours after birth, the respiratory distress with primary ciliary dyskinesia patients occurs 12 to 24 hours after birth in term infants.  Four main clinical features have been described in primary ciliary dyskinesia including unexplained neonatal respiratory distress in term infants, early onset year-round wet cough, early onset year-round nasal congestion, and laterality defects. If three or more of these features are met, the specificity for primary ciliary dyskinesia diagnosis is more than 96%. About half of patients with primary ciliary dyskinesia also have situs inversus totalis, including transposition of the right and left lung. Male infertility is common and occurs in nearly 100% of males. Females can present with reduced fertility or ectopic pregnancy due to abnormal fallopian tube transit of oocytes. Patients may also have chronic sinusitis and nasal congestion that does not change with seasons and does not resolve between viral infections. Persistent daily cough that begins in infancy is reported in nearly 100% of primary ciliary dyskinesia patients.

Evaluation

Diagnosing primary ciliary dyskinesia is challenging as it results from a variety of defects in cilia and no single diagnostic test can detect all defects (Figure). Diagnosis is typically achieved with a combination of clinical features as described above in conjunction with diagnostic testing which may include procedures such as nasal or bronchial brush biopsy to demonstrate abnormal ciliary ultrastructure and ciliary motility. In patients older than 5 years, nasal nitric oxide measurements are sensitive and specific for diagnosing primary ciliary dyskinesia. Paranasal sinus epithelium produces nitric oxide, and nasal nitric oxide measurements are typically extremely low (less than 100 nL/min) in primary ciliary dyskinesia patients. Decreased nasal nitric oxide values can also be seen in acute viral respiratory infections and patients with cystic fibrosis. Therefore, patients should be fully recovered from viral illnesses, and cystic fibrosis should be ruled out before performing this test. Since there some of the features overlap with other chronic diseases such as cystic fibrosis, sweat chloride testing and if indicated genetic testing for cystic fibrosis should be completed in all patients being evaluated for primary ciliary dyskinesia. However, otitis media a typical feature in a patient with primary ciliary dyskinesia is not a feature of cystic fibrosis. Other conditions, such as immunodeficiency, asthma, chronic pulmonary aspiration and allergic rhinitis can also present similarly and should be considered. High-speed video microscopy analysis for the evaluation of ciliary motility is extremely sensitive and specific. Additionally, various ciliary defects can be observed on electron microscopic examination of the samples obtained by ciliary biopsy, including immotile cilia, poor motility, and ineffective and slow beat patterns. Although electron microscopy (EM) analysis can aid in diagnosis, there is a subset of patients with primary ciliary dyskinesia with no demonstrable ultra-structural abnormalities identified. Furthermore, transient ciliary dyskinesia may be acquired following epithelial injury from viral respiratory tract infections or exposure to pollutants. Genetic testing should also be considered as 33 genes have been associated with primary ciliary dyskinesia. However, not all of them are included in the commercially available primary ciliary dyskinesia genetic testing panel. In the United States, a combination of ciliary biopsy to demonstrate ciliary ultrastructural abnormalities in combination with genetic testing is used for the diagnosis, while a combination of genetic testing and high-speed video microscopy is used in the Europe.[9][10][11][12]

Treatment / Management

Primary ciliary dyskinesia patients should be managed in centers that specialize in primary ciliary dyskinesia and chronic pulmonary diseases. Primary ciliary dyskinesia patients should be evaluated by a pulmonologist two to four times per year with spirometry and surveillance cultures of sputum. A chest radiograph should be completed at the time of diagnosis and during acute respiratory exacerbations. At least once after diagnosis, chest CT to evaluate for bronchiectasis should be considered. Additionally, children with primary ciliary dyskinesia should be evaluated by ear-nose-throat specialist one to two times per year and as needed in adults. An audiology assessment should be performed since there is a high incidence of recurrent otitis media with chronic middle ear effusions and associated complications of conductive hearing loss. Patients should be monitored for chronic rhinosinusitis and nasal polyps. Primary ciliary dyskinesia patients should receive daily chest physiotherapy, influenza vaccination, and pneumococcal vaccination as indicated. Antibiotics should be prescribed for acute respiratory exacerbations. In cases with recurrent respiratory infections, long-term oral or nebulized antibiotics can be considered. Gene editing has been proposed as a possible future treatment for primary ciliary dyskinesia. Ex vivo gene repair by site-specific recombination has been found to rescue ciliary beating, which could have tremendous application in primary ciliary dyskinesia patients.

Enhancing Healthcare Team Outcomes

Primary ciliary dyskinesia is managed by a multidisciplinary team of healthcare workers. Primary ciliary dyskinesia patients should be managed in centers that specialize in primary ciliary dyskinesia and chronic pulmonary diseases. Primary ciliary dyskinesia patients should be evaluated by a pulmonologist two to four times per year with spirometry and surveillance cultures of sputum. Additionally, children with primary ciliary dyskinesia should be evaluated by ear-nose-throat specialist one to two times per year and as needed in adults. An audiology assessment should be performed since there is a high incidence of recurrent otitis media with chronic middle ear effusions and associated complications of conductive hearing loss. The primary care provider and nurse practitioner should monitor for chronic rhinosinusitis and nasal polyps. These patients should receive daily chest physiotherapy, influenza vaccination, and pneumococcal vaccination as indicated. Antibiotics should be prescribed for acute respiratory exacerbations.[13][14]

 


  • Image 5718 Not availableImage 5718 Not available
    Contributed by Girish Sharma, MD, FCCP, FAAP
Attributed To: Contributed by Girish Sharma, MD, FCCP, FAAP

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Ciliary Dysfunction (Kartagener Syndrome, Primary Ciliary Dyskinesia) - Questions

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A 3-year-old child is seen in the clinic with recurrent respiratory tract infections. A lung examination reveals an empty right upper quadrant and a full left lower quadrant. Chest x-ray reveals that the base of the heart is in the right chest cavity. What is the most likely diagnosis?



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What is the underlying defect in Kartagener disease?



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Kartagener syndrome is due to a defect in which of the following?



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A 27-year-old male presents to a fertility clinic after his wife's evaluation is normal. He has a history of recurrent sinus infections, bronchiectasis, and situs inversus. He is sterile. Which of the following is the most likely reason for his sterility?



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Which of the following statements BEST describes the value of measuring the nasal cilia with a saccharin test?



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In Kartagener syndrome, what is the basic defect?



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A 17-year-old male presents with a long history of recurrent upper respiratory tract infections and sinusitis. He is found to have nonmotile sperm. With what is his major pathology associated?



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Which of the following medical conditions is NOT seen in Kartagener syndrome?



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Which of the following features is NOT seen in patients with Kartagener syndrome?



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A 24-year-old presents to a fertility clinic after his wife's evaluation is normal. He has history of recurrent sinus infections, bronchiectasis, and situs inversus. He is sterile. Which of the following is the most likely reason?



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Kartagener syndrome has what pattern of inheritance?



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Which of the following findings is NOT considered part of Kartagener syndrome?



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During an investigation for infertility a 30 year old male is found to have immotile sperm. Past medical history is significant for recurrent upper and low respiratory infections. He was just diagnosed with bronchiectasis. Which of the following is most likely on chest x-ray?



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Which of the following diseases puts patients at a higher risk of sinus infection?



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A 6-year-old child has had recurrent infections of the upper and lower respiratory tract. These have included pneumonia, chronic otitis media requiring tympanostomy tubes, and sinusitis. Chest radiograph shows dextrocardia. What will biopsy of the nasal mucosa show?



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A 24-year-old male has a history of recurrent sinus and pulmonary infections. The patient has Situs inversus and CT of the chest shows thickened and dilated airways extending almost to the pleura. There are numerous mucopurulent plugs seen on bronchoscopy. Select the pathophysiologic mechanism.



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What is not associated with Kartagener syndrome?



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What heredity pattern is consistent of Kartagener syndrome?



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Which condition is not associated with Kartagener syndrome?



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Which of the following statements is correct about primary ciliary dyskinesia (PCD)?



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Which of the following tests is not used to aid in the diagnosis of primary ciliary dyskinesia?



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Ciliary Dysfunction (Kartagener Syndrome, Primary Ciliary Dyskinesia) - References

References

Tadesse A,Alemu H,Silamsaw M,Gebrewold Y, Kartagener's syndrome: a case report. Journal of medical case reports. 2018 Jan 10;     [PubMed]
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Irving S,Carr S,Hogg C,Loebinger M,Shoemark A,Bush A, Lung Clearance Index (LCI) is Stable in Most Primary Ciliary Dyskinesia (PCD) Patients Managed in a Specialist Centre: a Pilot Study. Lung. 2017 Aug;     [PubMed]
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Nyilas S,Schlegtendal A,Singer F,Goutaki M,Kuehni CE,Casaulta C,Latzin P,Koerner-Rettberg C, Alternative inert gas washout outcomes in patients with primary ciliary dyskinesia. The European respiratory journal. 2017 Jan;     [PubMed]
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Alanin MC,Aanaes K,Høiby N,Pressler T,Skov M,Nielsen KG,Johansen HK,von Buchwald C, Sinus surgery can improve quality of life, lung infections, and lung function in patients with primary ciliary dyskinesia. International forum of allergy     [PubMed]
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Majithia A,Fong J,Hariri M,Harcourt J, Hearing outcomes in children with primary ciliary dyskinesia--a longitudinal study. International journal of pediatric otorhinolaryngology. 2005 Aug;     [PubMed]

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