“…Thus the demonstration of PIG on histology may be a general marker of developmental dysmaturity of the pulmonary interstitial compartment and not an entity in itself. Among the associated conditions, congenital heart defects and pulmonary hypertension were most common [11,13,16,[25][26][27][28][29]. More importantly from a clinical point of view, mucopolysaccharidoses (MPS) were overrepresented in our cohort with two out of eleven children.…”