Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrates obscuration of the right heart border with a confluent opacity . This appears to be located within the right middle lobe as appreciated on the lateral chest radiograph , concerning for pneumonia . Lungs are hyper expanded with flattening of the diaphragms bilaterally consistent with emphysematous changes . Heart size is within normal limits . Mediastinal and hilar contours are within normal limits . There is no pleural effusion or pneumothorax . Chronic right humeral head deformity is noted .
    OUTPUT:
    
COPD with superimposed right middle lobe pneumonia .