Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volume is small . The left mid lung 1 .6 cm nodule is also seen on recent chest CT . Retrocardiac opacity partially obscuring the left hemidiaphragm could represent pneumonia in the right clinical setting . No pleural effusions or pneumothorax . The heart size is mildly enlarged . The mediastinal silhouette is normal .
    OUTPUT:
    
1 . Retrocardiac opacity partially obscuring the left hemidiaphragm could represent pneumonia in the right clinical setting . 2 . The left mid lung 1 .6 cm nodule is also seen on recent chest CT .