Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . There appears to be effacement of the right mediastinal border , which could be from a tortuous aorta or anterior mediastinal mass . Posteriorly in the retrocardiac region , note is made of a small 7 - mm nodule . There is no pneumothorax . No pleural effusions are identified . Visualized osseous structures are unremarkable .
    OUTPUT:
    
1 . Effacement of the right mediastinal border , either secondary to a tortuous aorta or anterior mediastinal mass . 2 . 7 - mm nodule seen in the retrocardiac region on the lateral radiograph . Recommend CT with contrast for further evaluation . Findings were placed in the critical results dashboard by Dr . ___ at 6p on the day of the exam .