Enhancing right upper lobe collapse with sharp margins delineated laterally with minor fissure and posteriorly with major fissure.

Evidence of volume loss in the right hemithorax.

white arrows:lesser fissure.

open arrow:greater fissure.

obstruction in the lobar bronchus is demonstrated(black arrow).

n=mediastinal lymphadenopathy

black arrow head=compressed superior vena cava

white arrows=collapsed right upper lobe

black arrow=obstructed upper lobe bronchus.