Clinical scenario: recurrent chest infections & otitis media | bronchiectasis
A 10-year-old boy is evaluated for recurrent productive cough and chronic nasal congestion. Since infancy, he has had repeated episodes of otitis media requiring multiple courses of antibiotics. His parents report a persistent wet cough and poor exercise tolerance. Examination reveals digital clubbing, bilateral coarse crackles, and bilateral conductive hearing loss.
High-resolution CT of the chest demonstrates bilateral lower lobe bronchiectasis. A chest radiograph obtained during admission unexpectedly shows the cardiac apex on the right side.
Which is the most likely diagnosis?
A. Alpha-1 antitrypsin deficiency
B. Cystic fibrosis
C. Kartagener syndrome
D. Post-infectious bronchiectasis
E. Primary immunodeficiency
Correct answer & Explanation:
Correct answer: C. Kartagener syndrome
Explanation: Kartagener syndrome
Kartagener syndrome is a subtype of primary ciliary dyskinesia (PCD) characterized by the classic triad:
- Bronchiectasis
- Chronic sinusitis
- Situs inversus (dextrocardia)
Defective motile cilia impair mucociliary clearance, resulting in recurrent sinopulmonary infections, chronic otitis media, and progressive bronchiectasis.
Why other options are incorrect:
- A. Alpha-1 antitrypsin deficiency: Causes early emphysema and liver disease, not chronic sinusitis with dextrocardia.
- B. Cystic fibrosis: Can cause bronchiectasis, but chronic otitis media and dextrocardia strongly favor Kartagener syndrome.
- D. Post-infectious bronchiectasis: Does not explain chronic ENT disease or situs inversus.
- E. Primary immunodeficiency: Causes recurrent infections but not situs inversus.
Exam pearl:
In any child with:
- Chronic wet cough
- Recurrent sinusitis
- Chronic otitis media
- Dextrocardia or situs inversus
think Kartagener syndrome (Primary Ciliary Dyskinesia) until proven otherwise.
