Table 1

Similarities and differences between PLCH in children and adults

ChildrenAdults
Sites involvedMostly as part of multisystem LCHMostly isolated PLCH
SmokingNot generally associated with smokingNearly universally associated with smoking
PneumothoracesLess common as first presentationMore common as first presentation
Radiological findingsInvolvement of the costophrenic angle and lower lung fieldsSparing of the costophrenic angle and lower lung fields