“Pulmonary Interstitial Glycogenosis: Diagnostic Evaluation and Clinical Course,” written by Liptzin et al is a timely and insightful phenotypic summary of a rare pediatric interstitial lung disease. Twenty‐four infants with biopsy‐proven pulmonary interstitial glycogenosis (PIG) were reviewed at their center. Genetic analysis, bronchoscopy results, imaging, biopsy, and cardiology findings were described, and treatment decision and clinical outcomes were discussed.