From Physiology to Intervention: Endoscopic Adenoid-to-Choanae Ratio Thresholds for Symptomatic Adenoid Hypertrophy
Aleksander Zwierz1, Krystyna Masna1, Paweł Burduk1
1Department of Otolaryngology, Phoniatrics and Audiology, Faculty of Health Sciences, Ludwik Rydygier Collegium Medicum, Nicolaus Copernicus University, Bydgoszcz, Poland.
Insights
A 60% adenoid-to-choanae (A/C) ratio on endoscopy effectively distinguishes symptomatic from asymptomatic preschool children. This finding supports a new grading scale for adenoid hypertrophy, guiding management decisions for nasal obstruction and sleep issues.
Area of Science:
- Pediatric Otolaryngology
- Respiratory Medicine
- Diagnostic Imaging
Background:
- Adenoid enlargement is a common cause of nasal obstruction and sleep-disordered breathing in preschoolers.
- Differentiating physiological growth from clinically significant hypertrophy is challenging due to age-related lymphoid development.
- Current endoscopic grading schemes lack standardized age-specific norms and clear management thresholds.
Purpose of the Study:
- To establish endoscopic adenoid-to-choanae (A/C) ratio cut-offs for discriminating symptomatic from asymptomatic preschool children.
- To propose a practical, management-oriented grading scale for adenoid hypertrophy in this age group.
Main Methods:
- Retrospective analysis of 225 preschool children (ages 3-7) with standardized history, flexible nasopharyngoscopy, MASNA mucus scoring, and tympanometry.
- Adenoid size quantified via blinded video review to determine the A/C ratio.
- Children classified as symptomatic or asymptomatic based on core symptom responses.
Main Results:
- Symptomatic children exhibited a greater median A/C ratio compared to asymptomatic children.
- Receiver operating characteristic (ROC) analysis identified an A/C ratio of 60% as the optimal threshold.
- An A/C ratio exceeding 60% was the sole independent predictor of symptomatic status.
Conclusions:
- The endoscopic A/C ratio is a strong discriminator of symptomatic versus asymptomatic presentations in preschool children.
- An A/C ratio threshold of 60% reliably separates predominantly asymptomatic from symptomatic children.
- Findings support a three-tier grading scale (Degree I: ≤60%, Degree II: 65%-75%, Degree III: ≥80%) to guide management.
Abstract:
ImportanceAdenoid enlargement in preschool children is commonly cited as a cause of nasal obstruction and sleep-disordered breathing, yet age-related lymphoid development complicates differentiation between physiological growth and clinically significant hypertrophy. Existing endoscopic grading schemes lack consensus on age-specific normative limits and clear management thresholds.ObjectiveThis study aimed to determine endoscopic adenoid-to-choanae (A/C) ratio cut-offs that discriminate symptomatic from asymptomatic preschool children and to propose a practical, management-oriented grading scale.DesignSTROBE.ParticipantsWe performed a retrospective analysis of 225 preschool children (age 3-7). Standardized history-taking, flexible nasopharyngoscopy, MASNA (Mucus on Adenoid Scale by Nasopharyngoscopy Assessment) mucus scoring, and tympanometry were performed.InterventionChildren were classified as symptomatic (≥2 "yes" responses to core symptom items) or asymptomatic (no more than one "occasionally" response). Adenoid size was quantified from blinded video review as the A/C ratio.Main Outcome MeasuresReceiver operating characteristic (ROC) analysis identified an optimal A/C threshold for symptomatic status; multivariable logistic regression evaluated independent predictors.ResultsMedian A/C ratio was greater in symptomatic versus asymptomatic children. Symptomatic children also had higher MASNA mucus scores, greater reported rhinorrhea frequency, and less favorable tympanometric profiles. ROC analysis identified an A/C ratio of 60% as the optimal cut-off to discriminate symptomatic from asymptomatic children. An A/C ratio >60% emerged as the sole independent predictor of symptomatic status.ConclusionIn this cohort, the endoscopic A/C ratio strongly discriminated symptomatic from asymptomatic presentations. An A/C threshold of 60% reliably separated predominantly asymptomatic from symptomatic children.RelevanceThese findings, in conjunction with clinical experience and results from our previous studies, form the basis for a proposed three-tier, management-oriented endoscopic scale for preschool patients: Degree I (A/C ≤60%)-within age-appropriate norm; Degree II (A/C 65%-75%)-hypertrophy amenable to conservative management/observation; Degree III (A/C ≥80%)-hypertrophy for which we suggest that surgical intervention ought to be considered.
