Right middle lobe atelectasis First study the x-rays and then continue reading. What are the findings? Blurring of the right heart border (silhouette sign) Triangular density on the lateral view as a result of collapse of the middle lobe Usually right middle lobe atelectasis does not result in noticable elevation of the right diaphragm. A pectus excavatum can mimick a middle lobe atelectasis on a frontal view, but the lateral view should solve this problem. #Clinical #Radiology #CXR #Lateral #RML #MiddleLobe #Lobar #Collapse #SilhouetteSign #RadiologyAssistant
