Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No definite focal consolidation is seen . No pleural effusion or pneumothorax is seen . Relative rounded left base retrocardiac opacity with at least a couple of lucencies within has appearance suggestive of a hernia containing bowel / stomach . Upon discussion with the resident taking care of the patient , the patient does not currently have a cough or other pulmonary symptoms . The cardiac silhouette is mildly enlarged . Right paratracheal opacity without indentation on the trachea most likely relates to prominent vasculature and / or mediastinal fat . The cardiac silhouette appears enlarged . Degenerative changes are seen in the bilateral glenohumeral joints .
    OUTPUT:
    
Rounded left base retrocardiac opacity with lucencies within is most suggestive of a hernia containing bowel / stomach . This could be confirmed on chest CT . Of note , per the emergency medicine physician resident , the patient does not have pulmonary symptoms . Enlarged cardiac silhouette .