Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear . The right basilar opacity / effusion on the most recent chest radiograph has resolved . There is increased soft tissue density in the anterior mediastinum seen on lateral radiograph above the aortic arch , causing mass effect and posterior displacement of the trachea . This density is seen as a vague opacity in the left apex on frontal radiograph . It may have been present in ___ but is more conspicuous today . Given no correlative finding on thyroid U / S , recommend non-urgent CT neck . The aorta is elongated and tortuous . The cardiomediastinal silhouette reveals stable , mild cardiomegaly . The hilar contours and pleural surfaces are normal . There is no pneumothorax or pleural effusion . Thoracic scoliosis and degenerative changes in the thoracic spine are redemonstrated . Surgical clips are in the abdomen .
    OUTPUT:
    
1 . Anterior mediastinal opacity more conspicuous since ___ without definite correlative finding on thyroid ultrasound . Recommend non-urgent CT neck for further evaluation . 2 . Mild cardiomegaly is unchanged .