Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the immediate prior study of ___ , the small to moderate right apical pneumothorax is unchanged . Increasing opacification of the right lung base in the absence of clinical signs of pneumonia likely represents right middle lobe collapse . There may be a small left pleural effusion . The heart is top normal in size and unchanged . The right - sided chest wall port catheter tip ends in the low SVC . There is no pulmonary edema .
    OUTPUT:
    
1 . Unchanged small to moderate right apical pneumothorax . 2 . Increased right basilar opacification , likely representing right middle lobe collapse .