Right middle lobe consolidation - silhouette sign

Case contributed by Dr Ian Bickle


Short history of cough and fever. Chest infection?

Patient Data

Age: 25 years
Gender: Male

The distinct silhouette of the right heart border is lost.   Consolidation in the right middle lobe.

Left lung clear.

Heart size normal.

Normal mediastinal contours.

Annotated image

The left image is a normal chest radiograph with the red line indicating the silhouette of the right heart border and right middle lobe.

The right image shows the same red line delineating where the silhouette should be, but is lost due to consolidation in the right middle lobe.

Case Discussion

A good side-by-side illustration of the concept of the silhouette sign of Benjamin Felson.

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Case information

rID: 59398
Published: 7th Apr 2018
Last edited: 2nd Jul 2018
System: Chest
Tag: tutong
Inclusion in quiz mode: Included
Institution: Rotherham Foundation Hospital Trust

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