Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low bilateral lung volumes . Slight interval increase in the left lower lung zone airspace opacities . Additionally there is a new opacity in the right midlung zone , peripherally . There is suspected small left pleural effusion . No pneumothorax identified . A partially evaluated ventriculoperitoneal shunt catheter courses along the left neck and left hemithorax . Re - visualized are degenerative changes around the left shoulder .
    OUTPUT:
    
Increasing opacities in the left lower lung zone as well as a new opacity in the right mid lung zone likely reflect pneumonia .