Presentation
Shortness of breath
Patient Data
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 projection demonstrates a triangular opacity projecting over the cardiac shadow. The horizontal fissure cannot be identified.
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.