Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a small left pleural effusion . A density seen obscuring the left hemidiaphragm on the lateral view may represent segmental atelectasis or fluid is seen within the fissure . The cardiac silhouette remains mildly enlarged . The mediastinal contours and hilar structures are unremarkable . A left - sided pacemaker is present history injury to right ventricle . Sternotomy wires and mediastinal clips are again noted .
    OUTPUT:
    
Opacity within the left lower lobe may reflect fluid in the fissure from a small left pleural effusion versus segmental atelectasis or consolidation . Further clarification with oblique views is recommended . These findings were discussed with Dr . ___ by Dr . ___ at 13 : 17 on ___ by telephone at the time of discovery .