Presentation
Smoker. Breathless. Cause?
Patient Data
Age: 65 years
Gender: Female
From the case:
Left lower lobe collapse
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Triangular (or sail shaped) density behind the left heart border, with volume loss in the left hemi-thorax.
Inferior descent of the left hilum.
Right lung clear.
Case Discussion
The classical appearance of a left lower lobe collapse - the triangular density appearing like the sail of a traditional boat hence the term 'sail sign' attributed to this appearance.