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Deep cervical lymph node hypertrophy: a new paradigm in the understanding of pediatric obstructive sleep apnea
Sanjay R Parikh1, Babak Sadoughi, Sanghun Sin
1Department of Otolaryngology-Head and Neck Surgery, Seattle Children's Hospital-University of Washington School of Medicine, Seattle, Washington 98105, USA. sanjay.parikh@seattlechildrens.org
Insights
Pediatric obstructive sleep apnea (OSA) is linked to enlarged deep cervical lymph nodes and adenotonsillar tissue. This study suggests OSA may be part of a broader spectrum of cervical lymphoid hypertrophy in children.
Area of Science:
- Otolaryngology
- Pediatric Sleep Medicine
- Radiology
Background:
- Adenotonsillar hypertrophy is a known cause of pediatric obstructive sleep apnea (OSA).
- The role of other cervical lymphoid tissues in pediatric OSA remains unclear.
Purpose of the Study:
- To investigate whether adenotonsillar hypertrophy is an isolated factor in pediatric OSA.
- To determine if it is part of a larger spectrum of cervical lymphoid hypertrophy.
Main Methods:
- A prospective case-control study involving 70 patients with OSA and 76 matched controls.
- Polysomnography was used to diagnose OSA, and MRI of the upper airway was performed.
- Volumetric analysis of lymphoid tissue was conducted, comparing patients and controls.
Main Results:
- Children with OSA showed significantly poorer sleep measures compared to controls.
- Patients with OSA had larger volumes of retropharyngeal, upper jugular, and adenotonsillar lymphoid tissues.
- No significant differences in age, weight, height, or BMI were observed between groups.
Conclusions:
- Pediatric OSA is associated with increased volumes of deep cervical lymph nodes and adenotonsillar tissue.
- This suggests a broader spectrum of cervical lymphoid hypertrophy contributing to pediatric OSA.
- Findings have implications for future research and clinical management of pediatric OSA.
Objectives/Hypothesis:
To determine if adenotonsillar hypertrophy is an isolated factor in pediatric obstructive sleep apnea (OSA), or if it is part of larger spectrum of cervical lymphoid hypertrophy.
Study Design:
Prospective case control study.
Methods:
A total of 70 screened patients (mean age 7.47 years) underwent polysomnography to confirm OSA, and then underwent MRI of the upper airway. Seventy-six matched controls (mean age 8.00 years) who already had an MRI underwent polysomnography. Volumetric analysis of lymphoid tissue volumes was carried out. Chi-square analysis and Student's t test were used to compare demographic data and lymph node volumes between cohorts. Fisher's Exact test and Chi-square analysis were used to compare sleep data.
Results:
Patients and controls demonstrated no significant difference in mean age (7.47 vs. 8.00 yrs), weight (44.87 vs. 38.71 kg), height (124.68 vs. 127.65 cm), or body-mass index (23.63 vs. 20.87 kg/m(2)). OSA patients demonstrated poorer sleep measures than controls (P < 0.05) in all polysomnography categories (sleep efficiency, apnea index, apnea-hypopnea index, baseline SpO2, SpO2 nadir, baseline ETCO2, peak ETCO2 , and arousal awakening index). Children with OSA had higher lymphoid tissue volumes than controls in the retropharyngeal region (3316 vs. 2403 mm(3), P < 0.001), upper jugular region (22202 vs. 16819 mm(3), P < 0.005), and adenotonsillar region (18994 vs. 12675 mm(3), P < 0.0001).
Conclusions:
Children with OSA have larger volumes of deep cervical lymph nodes and adenotonsillar tissue than controls. This finding suggests a new paradigm in the understanding of pediatric OSA, and has ramifications for future research and clinical care.
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