Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is stable prominence of the bilateral hilar regions , more so on the left than the right , and consistent with the patient 's known hilar lymphadenopathy . This is not significantly changed from the prior chest radiograph . There is no consolidation , edema , pleural effusion , or pneumothorax . An irregularity of the right posterior sixth rib likely reflects a prior healed fracture . This is unchanged in appearance from the prior exam .
    OUTPUT:
    
1 . Stable bilateral mild hilar lymphadenopathy which is compatible with the patient 's history of sarcoidosis . 2 . Stable appearance of an old right sixth rib fracture . 3 . No acute cardiopulmonary process .