Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Breast tissue projects over the lungs limiting evaluation of the lung bases . Despite the limitations , the lung markings are coarsened and increased density is seen at the right base . No effusion or pneumothorax identified . The heart and mediastinal contours are normal . A screw in the right humeral head is unchanged from ___ .
    OUTPUT:
    
Right lower lobe pneumonia .