Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are slightly low with bronchovascular crowding . No pleural effusion or pneumothorax . The heart is normal in size . The mediastinum appears slightly widened on this portable radiograph , which may be related to technique or mediastinal pathology . The hilar contours are unremarkable . No acute osseous abnormality .
    OUTPUT:
    
1 . Wide - appearing mediastinum for a ___-year - old , which may relate to technique or mediastinal pathology . No prior imaging to compare . Recommend returning for a conventional ( PA and lateral ) radiograph view if symptoms persist or if history of trauma . 2 . No focal pneumonia .