Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No focal consolidation or pneumothorax is detected . There may be a tiny right pleural effusion . Heart size is normal . Anterior mediastinal mass likely corresponds to known primary mediastinal large B - cell lymphoma .
    OUTPUT:
    
Anterior mediastinal mass , without radiographic evidence for pneumonia . Possible tiny right pleural effusion .