Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . On the lateral view there is a convex opacity arising posteriorly partially overlapping with the lower thoracic vertebral bodies which is new from prior exams and is concerning for a posterior mediastinal mass . Otherwise the lungs are clear . Cardiomediastinal silhouette is normal . Bony structures appear intact . No free air below the right hemidiaphragm . Degenerative spurring is noted anteriorly in the thoracic spine .
    OUTPUT:
    
Findings concerning for a posterior mediastinal mass with convex opacity overlapping with the mid-to - lower T - spine , new from prior exam . Correlation with CT advised .