Similarities and differences between PLCH in children and adults
| Children | Adults | |
| Sites involved | Mostly as part of multisystem LCH | Mostly isolated PLCH |
| Smoking | Not generally associated with smoking | Nearly universally associated with smoking |
| Pneumothoraces | Less common as first presentation | More common as first presentation |
| Radiological findings | Involvement of the costophrenic angle and lower lung fields | Sparing of the costophrenic angle and lower lung fields |