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High-speed Video Microscopy Analysis for First-line Diagnosis of Primary Ciliary Dyskinesia
Published on: January 19, 2022
Vestibular and Balance Impairment Is Common in Children With Primary Ciliary Dyskinesia
Faisal Zawawi1,2, Blake C Papsin2,3, Sharon Dell4,5
1Department of Otolaryngology-Head and Neck Surgery, King Abdulaziz University, Jeddah, Saudi Arabia.
Insights
Vestibular impairment is common in children with primary ciliary dyskinesia (PCD). Many cases of imbalance and vestibular issues in PCD patients go undiagnosed, highlighting a need for better screening.
Area of Science:
- Pediatric otolaryngology
- Genetics
- Neurology
Background:
- Primary ciliary dyskinesia (PCD) is a rare genetic disorder causing respiratory issues.
- Middle ear effusion is a common otologic manifestation of PCD.
- The prevalence of vestibular impairment in children with PCD is not well-established.
Purpose of the Study:
- To investigate the presence and extent of vestibular impairment in children diagnosed with PCD.
- To determine if common genetic mutations in PCD are associated with vestibular dysfunction.
Main Methods:
- A cross-sectional cohort study was conducted at a tertiary pediatric referral hospital.
- Twenty-five children with confirmed PCD underwent clinical assessment and vestibular testing.
- Tests included single-leg stance with eyes open/closed and video head impulse testing (vHIT).
Main Results:
- Nineteen out of 25 (76%) children with PCD exhibited vestibular impairment.
- Fifteen participants failed the single-leg stance test, and six had abnormal vHIT results.
- The DNAH5 gene mutation was most common (32%) and strongly associated with vestibular impairment (87.5%).
Conclusions:
- A significant majority of children with PCD experience vestibular impairment, often previously undiagnosed.
- Vestibular pathology and imbalance may be under-diagnosed in the PCD population.
- Routine vestibular screening is recommended for children with PCD.
Objective:
Primary ciliary dyskinesia (PCD) is a rare genetic disorder that presents with a wide range of respiratory complaints. The most common otologic associated disorder is middle ear effusion. We ask if children with PCD suffer from vestibular impairment.
Study Design:
Cross-sectional cohort study.
Setting:
Tertiary pediatric referral hospital.
Patients/Participants:
Children with confirmed PCD.
Intervention/Methods:
All included participants were clinically assessed to be at baseline then basic demographics and medical histories were collected, including the specific genetic mutation these patients have. After which, all patients underwent two vestibular tests. The first was to assess their ability to stand on one foot with their eyes open and then with their eyes closed and the second was video head impulse test (vHIT).
Main Outcome Measures:
Ability standing on one foot with the eyes closed and vHIT.
Results:
During this period, 25 children with PCD were recruited for the study. The mean age at recruitment was 11.26 years (4-18 yr). There were 11 women and 14 men. All patients were able to participate in both tests. Nineteen participants (76%) had vestibular impairment. Fifteen of them failed to stand on one foot with their eyes closed and six of 25 had abnormal vHIT. The most common involved gene was DNAH5 8/25 (32%) and it was associated with vestibular impairment in seven of eight participants (87.5%).
Conclusion:
The majority of children with PCD that we tested suffered from vestibular impairment that was previously undiagnosed. This potentially indicates that imbalance and vestibular pathology is under-diagnosed in children with PCD.
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