Childhood diffuse parenchymal lung diseases: We need a new classification.

Area of Science:

• Pediatric Pulmonology
• Rare Respiratory Diseases
• Histopathology

Background:

• Childhood diffuse parenchymal lung diseases (DPLD) are a rare, heterogeneous group of respiratory disorders.
• Lack of consensus on terminology, classification, and management hinders effective care.
• Wide clinical spectrum and rarity contribute to diagnostic and therapeutic challenges.

Purpose of the Study:

• To classify pediatric DPLD patients using the established chILD Network Classification.
• To identify limitations of the current classification scheme in encompassing all DPLD cases.
• To advocate for revisions in DPLD classification for improved clinical consensus.

Main Methods:

• Retrospective analysis of 130 pediatric DPLD patients diagnosed between 1974 and 2012.
• Evaluation of clinical, laboratory, radiological, and histopathological data.
• Classification of patients according to the chILD Network Classification criteria.

Main Results:

• The study identified 16 distinct DPLD diagnostic groups, with pulmonary hemosiderosis being the most prevalent (28.5%).
• Idiopathic interstitial pneumonias, pulmonary hemosiderosis, sarcoidosis, and lipid storage diseases comprised 70% of diagnoses.
• The chILD Network Classification excluded several common diagnoses, including certain idiopathic interstitial pneumonias, idiopathic pulmonary hemosiderosis, pulmonary alveolar microlithiasis, and diffuse chondroid malformation.

Conclusions:

• The current chILD Network Classification requires revision to include all childhood DPLD entities.
• A revised classification is essential for achieving consensus on DPLD therapy and follow-up.
• Development of a comprehensive childhood DPLD classification is needed to cover all disease groups.