Left lower lobe collapse: sail sign

Case contributed by Dr Vikas Shah


Cough and shortness of breath.

Patient Data

Age: 65
Gender: Female

The lungs are hyperinflated with relatively flat diaphragms - a sign of pulmonary emphysema. There is a dense triangular opacity overlying the cardiac shadow with increased lucency of the left upper zone relative to the right upper zone. This is the "sail sign" of left lower lobe collapse with subsequent left upper lobe hyper-expansion.

Annotated image

Red triangle highlights the sail sign of left lower lobe collapse. 

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Case information

rID: 47232
Published: 5th Aug 2016
Last edited: 8th May 2017
System: Chest
Inclusion in quiz mode: Included

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