Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Midline sternotomy wires are again noted as well as mediastinal clips . Abnormal mediastinal contour reflects known mediastinal mass which per report likely represents thyroid goiter though clinical correlation is advised . The heart appears top - normal in size . There is mild hilar congestion without frank pulmonary edema . No large pleural effusion or pneumothorax . Bony structures are intact .
    OUTPUT:
    
Top normal heart size . Mild hilar congestion . Mediastinal prominence , likely thyroid goiter though correlation with prior workup advised .