Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a moderate to large left pleural effusion with an associated consolidation , which is likely atelectasis , although in the proper clinical setting , a pneumonia can not be excluded . There is no right pleural effusion . There is no consolidation , pulmonary edema , or pneumothorax . The cardiomediastinal silhouette is severely enlarged . The mediastinal contours are normal .
    OUTPUT:
    
1 . Moderate to large left pleural effusion . 2 . Probable left basilar atelectasis , although in the proper clinical setting , a pneumonia can not be fully excluded . 3 . Severe cardiomegaly .