Pediatric interstitial lung disease are exceedingly rare and usually associated withsignificant morbidity and mortality as a child is not a small adult and the futuredevelopment, current anatomy and physiology may be altered by disease process.Classification systems have been developed for adult ILD, but the diseases thataffect adults are very different and these systems do not work well when applied tochildren.The role of HRCT in paediatric ILD is evolving but more slowly than in the adultpopulation for a variety of reasons. Because diffuse lung disease is relativelyuncommon in children, the range of disease is more heterogeneous than in adults,and the CT features of specific pediatric diseases have not been fully categorized.Also, obtaining good-quality scans in younger children is difficult because of theirsmall size and inability to hold their breath.