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High-speed Video Microscopy Analysis for First-line Diagnosis of Primary Ciliary Dyskinesia
Published on: January 19, 2022
Recurrent pulmonary tuberculosis in a child with primary ciliary dyskinesia: a rare association
Dhruv Gandhi1, Reepa Agrawal1, Zahabiya Nalwalla1
1Pediatric TB Clinic, Department of Pediatric Infectious Diseases, B. J. Wadia Hospital for Children, Mumbai, India.
Insights
Primary ciliary dyskinesia (PCD) in a child with recurrent pulmonary tuberculosis (PTB) was diagnosed using whole exome sequencing. This case highlights the importance of genetic testing for PCD in pediatric patients with persistent lung issues.
Area of Science:
- Genetics
- Pulmonology
- Infectious Diseases
Background:
- Primary ciliary dyskinesia (PCD) is a rare genetic disorder affecting ciliary motility, leading to chronic lung infections.
- Recurrent pulmonary infections, like tuberculosis (PTB), can be challenging in children, especially when associated with underlying conditions.
Purpose of the Study:
- To report a case of an 8-year-old boy with recurrent PTB and newly diagnosed PCD.
- To emphasize the role of whole exome sequencing (WES) in diagnosing PCD in pediatric patients with bronchiectasis and recurrent infections.
Main Methods:
- Case report of an 8-year-old boy with chronic respiratory symptoms and a history of PTB.
- Diagnosis of PCD confirmed by whole exome sequencing (WES).
- High-resolution computed tomography (HRCT) for assessing lung structure; Xpert MTB/Rif Ultra for identifying *Mycobacterium tuberculosis*.
Main Results:
- The patient presented with symptoms of recurrent PTB despite prior treatment.
- HRCT revealed bronchiectatic changes and chronic suppurative lung disease.
- WES identified a PCD variant of unknown significance, leading to a PCD diagnosis (PICADAR score 8).
Conclusions:
- This case underscores the need for clinical suspicion and genetic evaluation (WES) in pediatric patients with recurrent pulmonary TB and bronchiectasis.
- Diagnosing PCD is crucial for managing chronic suppurative lung disease and preventing further complications.
- Early identification of PCD can guide appropriate treatment strategies for associated respiratory conditions.
Abstract:
Primary ciliary dyskinesia (PCD) is a rare genetic disorder characterised by defective ciliary motility, resulting in chronic pulmonary infections and bronchiectasis. An 8-year-old boy with recurrent pulmonary tuberculosis (PTB) and newly diagnosed PCD by whole exome sequencing (WES) is reported. He presented with a chronic cough, intermittent fever, night sweats and weight loss, 3 months after completing a 6-month first-line antituberculosis therapy (ATT) regimen for drug-sensitive PTB. High-resolution computerised tomography showed bronchiectatic changes and chronic suppurative lung disease. Broncho-alveolar lavage fluid was tested on Xpert MTB/Rif Ultra and detected rifampicin-sensitive Mycobacterium tuberculosis. In view of the bronchiectasis and chronic suppurative lung disease, WES was undertaken which identified a PCD variant of unknown significance. The Primary Ciliary Dyskinesia Rule (PICADAR) score was calculated to be 8. He was diagnosed with PCD and a relapse of drug-sensitive PTB, for which first-line ATT was resumed. In view of possible syndromic conditions such as PCD, this case highlights the need for clinical suspicion and genetic testing in paediatric patients with recurrent pulmonary TB and bronchiectasis.
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