Clinical bottom line
Pediatric laryngomalacia (LM) remains the most common cause of congenital stridor, characterized by supraglottic airway collapse during inspiration. Recent advancements emphasize improved noninvasive diagnostic modalities such as laryngeal ultrasound and refined endoscopic assessment, alongside evolving surgical techniques tailored to LM subtypes. While most cases resolve with conservative management, selected patients with severe or atypical presentations benefit from targeted surgical interventions including supraglottoplasty and transcervical epiglottopexy. Multidisciplinary care and individualized treatment planning are essential given the heterogeneity in clinical severity and airway anatomy.
What the evidence shows
Laryngomalacia is primarily diagnosed via flexible laryngoscopy, which remains the gold standard for visualizing supraglottic collapse (Mandour et al., 2011). However, Friedman et al. (2018) demonstrated that laryngeal ultrasound offers a promising, radiation-free, bedside adjunct for diagnosis, especially in infants where endoscopy may be challenging. Ultrasound can visualize arytenoid prolapse and epiglottic dynamics, potentially expediting diagnosis and reducing sedation risks.
Classification of LM into types based on anatomical involvement (e.g., type 1—arytenoid collapse, type 2—shortened aryepiglottic folds, type 3—posterior displacement of the epiglottis) informs management strategies (Monnier et al., 2010). Conservative management with observation and supportive care remains appropriate for the majority, as spontaneous resolution occurs by 12 to 24 months in most infants (Mandour et al., 2011; Powers et al., 2019).
Surgical intervention is indicated in approximately 10-20% of cases with severe airway obstruction, failure to thrive, or apnea (Chandran et al., 2014). Supraglottoplasty, involving division of aryepiglottic folds and removal of redundant tissue, is the most common procedure with high success rates and low morbidity (Chandran et al., 2014). More recently, Kanotra et al. (2021) described transcervical epiglottopexy as an effective surgical option for type 3 LM, addressing posterior epiglottic collapse refractory to standard supraglottoplasty.
Multidisciplinary approaches integrating pulmonology, otolaryngology, and speech therapy optimize outcomes, particularly in complex or syndromic cases (Powers et al., 2019). Early recognition of comorbidities such as gastroesophageal reflux and neurologic impairment is critical to comprehensive management.
Caveats and uncertainty
Despite advances, several uncertainties remain. The diagnostic accuracy and standardization of laryngeal ultrasound require further validation in larger cohorts and across diverse clinical settings (Friedman et al., 2018). The natural history of LM subtypes and predictors of surgical necessity are incompletely understood, limiting precise risk stratification.
Surgical outcomes vary by technique and patient factors; long-term comparative effectiveness data between supraglottoplasty and newer procedures like transcervical epiglottopexy are sparse (Kanotra et al., 2021). Additionally, potential complications such as supraglottic stenosis or aspiration warrant cautious patient selection and postoperative monitoring.
The role of adjunct medical therapies, including anti-reflux treatment, remains controversial with limited high-quality evidence supporting routine use (Mandour et al., 2011). Finally, the heterogeneity of LM presentations and overlap with other airway anomalies complicate diagnosis and management algorithms.
How this may change practice
Clinicians should consider incorporating laryngeal ultrasound as a noninvasive screening tool in infants with stridor where flexible laryngoscopy is not immediately feasible, potentially expediting diagnosis and reducing sedation exposure (Friedman et al., 2018). Awareness of LM subtypes can guide more tailored surgical planning, with transcervical epiglottopexy emerging as a viable option for type 3 LM refractory to standard approaches (Kanotra et al., 2021).
Emphasizing multidisciplinary evaluation and close monitoring allows timely identification of patients who may benefit from surgery versus conservative management. Counseling families on the typically benign natural course while recognizing indications for intervention remains paramount.
Future practice may evolve with further validation of ultrasound diagnostics and refinement of surgical techniques, improving safety and outcomes in this vulnerable population.