Right middle lobe collapse

Case contributed by A.Prof Frank Gaillard


Shortness of breath

Patient Data

Age: Adult
Gender: Male

PA chest x-ray

PA chest x-ray demonstrated some increase in density in the right lower zone, medially. The right heart border is somewhat ill-defined. The horizontal fissure cannot be identified. 


Lateral chest x-ray

Lateral projection demonstrates a triangular opacity projecting over the cardiac shadow. The horizontal fissure cannot be identified. 

Annotated image

Annotated x-rays

On frontal projection the right heart border is not clearly seen (blue dashed line). On lateral projection the right middle lobe appears as a wedge of increased density (orange arrows). 

Case Discussion

This case illustrates the typical appearance of right middle lobe collapse and the importance of a lateral film in confirming the abnormality. 

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Case information

rID: 15329
Published: 9th Oct 2011
Last edited: 27th Dec 2019
System: Chest
Inclusion in quiz mode: Included

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