Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A pacemaker generator overlies the left chest wall . The leads appear intact throughout their course , terminating in the expected location of the right atrium and right ventricle . The atrial lead continues to follow the path of a suspected duplicated SVC . There is stable increased density in the left lung base , findings suggestive of a moderate pleural effusion with underlying consolidation . Findings could reflect compressive atelectasis , though pneumonia is also within the differential . The left upper lobe and right lung appear clear . There is no pneumothorax . No vascular congestion or edema is evident . Mediastinal and hilar contours are within normal limits . Evaluation of the cardiac silhouette is limited by the left basilar consolidation .
    OUTPUT:
    
Stable left basilar consolidation . Atelectasis and pneumonia are within the differential with a probable overlying moderate effusion .