Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post CABG with sternotomy wires and clips being constant . A left upper extremity PICC has been removed in the interim . Small bilateral pleural effusions can not be excluded . The mediastinal contours are unchanged , and the heart remains mildly enlarged . There is no pneumothorax .
    OUTPUT:
    
Small bilateral pleural effusions can not be excluded .