Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear of airspace or interstitial opacity . Possible opacity and filling and of the retrosternal clear space , appears more pronounced since ___ could be an anterior mediastinal mass . No pleural effusions or pneumothorax . No acute or aggressive osseus changes .
    OUTPUT:
    
No radiographic of acute intrathoracic pulmonary disease . Increasing fullness of the retrosternal clear space , could be underlying anterior mediastinal mass . Suggest correlation with CT thorax .