Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right apical pleural thickening and superior retraction of right hilum are stable and consistent with patient 's history of right upper lobe resection . There is increased left lung base opacity in the infrahilar region . Mild pulmonary edema is increased . Enlarged cardiac silhouette is unchanged .
    OUTPUT:
    
1 . Increased left infrahihlar consolidation is probably atelectasis , however pneumonia can not be ruled out . If feasible , a chest radiograph with PA and lateral views would be helpful for better evaluation of left lung base . 2 . Mild pulmonary edema .