Medical Student CXR 1
All the classical features of a tight left lower lobe collapse:
1. Left retrocardiac density shaped like a sail - the 'sail sign'
2. Volume loss in the hemithorax.
3. Inferiorly displaced 'hidden' left hilum.
This is due to lung cancer until proven otherwise.
This is a classic rapid reporting or viva film for the FRCR 2B.