Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Azygos vein is distended and accompanied by mild pulmonary vascular engorgement but no evidence of pulmonary edema . Within the lungs , subtle areas of increased opacity have developed in the left upper and right lower lobes , and are concerning for developing pneumonia in the setting of elevated white blood cell count . There are no pleural effusions . Bilateral rib deformities appear unchanged , including an apparent osteochondroma at the level of the second anterior rib and a healed fracture involving the right sixth posterior rib .
    OUTPUT:
    
Left upper and right lower lobe airspace opacities concerning for developing pneumonia in the setting of elevated white blood cell count .