Left lower lobe pneumonia

Case contributed by Thuan Tzen, Koh
Diagnosis certain

Presentation

Shortness of breath, fever and rigors

Patient Data

Age: 50
Gender: Female
x-ray

Opacity projected behind the heart on the PA radiograph with loss of visualization of the left hemidiaphragm consistent with collapse / consolidation throughout the left lower lobe.  Small focus of linear atelectasis in the left costophrenic recess region.  Right lung and pleural space are clear.  Normal cardiomediastinal contour.  Cholecystectomy clips noted.

Case Discussion

Typical chest radiograph appearance of left lower lobe pneumonia with collapse / consolidation. Loss of left hemidiaphragm visualization (silhouette sign) and inability to trace the normal lung vessels behind the heart are the keys to identifying this on the PA radiograph. 

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