CT
Widespread patchy interstitial and ground-glass opacities with upper zone predominance.
No nodules, masses or cavitation. No tree-in-bud opacity or honeycombing.
No bronchiectasis or bronchiolectasis.
No thoracic lymphadenopathy.
In the context of recent stem cell transplantation, the CT findings suggest acute pulmonary graft versus host disease (GVHD).