Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest provided . Midline sternotomy wires are again seen . There is stable retrocardiac opacity which likely represents a hiatal hernia . The heart remains moderately enlarged . There is no evidence of local consolidation , effusion , or pneumothorax . No evidence of pulmonary edema . There is a dysplastic appearance of the bilateral humeral heads , which appear medially dislocated . This finding appears essentially stable from multiple prior exams .
    OUTPUT:
    
No acute findings .