Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette is mildly enlarged and central pulmonary arteries remain prominent , in keeping with the history of sickle cell disease . Chronic linear scarring is present at the lung bases , and new subtle areas of reticulation are identified in the periphery of the upper - to - mid lung regions bilaterally . Additionally , on the lateral radiograph , there is apparent lower lobe bronchial wall thickening as well as subtle increased opacity overlying the lower thoracic spine . There is also suggestion of small bilateral pleural effusions with slight blunting of the posterior costophrenic angles bilaterally , new from the prior study . Skeletal structures appear unchanged .
    OUTPUT:
    
1 . Bibasilar bronchial wall thickening and subtle lung opacities , which could potentially represent a developing bronchopneumonia . Followup chest radiographs may be helpful in this regard . 2 . Probable small bilateral pleural effusions .