Enigma variations: The multi-faceted problems of pre-school wheeze

Area of Science:

• Pediatric Pulmonology
• Allergy and Immunology
• Respiratory Medicine

Background:

• Wheezing disorders in children under 6 are common, yet management lacks consensus.
• Current symptom-based approaches are insufficient due to varied underlying causes of wheeze.
• Lack of clear definitions for preschool asthma and evidence on endotypes hinder effective treatment.

Purpose of the Study:

• To review current understanding of preschool wheezing management.
• To highlight the need for research into underlying endotypes and airway phenotypes.
• To advocate for a shift from symptom-based to phenotype-based management.

Main Methods:

• Literature review of publications on preschool wheezing over recent decades.
• Analysis of current approaches to diagnosing and treating wheezing disorders in young children.
• Discussion of the limitations of symptom-based diagnosis versus phenotype-based approaches.

Main Results:

• A symptom-based approach is inadequate for managing preschool wheeze.
• Identifying the "airway phenotype" is crucial for accurate diagnosis and treatment.
• Focusing on "treatable traits" improves specificity of care for children with asthma-like symptoms.

Conclusions:

• A paradigm shift towards airway phenotyping is needed for preschool wheeze.
• Individualized treatment based on phenotype improves diagnostic accuracy and therapeutic specificity.
• Further research is essential to define endotypes and refine phenotype-based management strategies.