Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is at the upper limits of normal size . The mediastinal and hilar contours appear unchanged . There is no pleural effusion or pneumothorax . There is a vague patchy opacity in the right lower lung which has increased since prior studies , particularly in the right costophrenic angle . The possibility of an infectious process could be considered clinically . A nodular focus projecting over the left lower chest is consistent with an unchanged nipple shadow , visible before . Mild degenerative changes are present along the thoracic spine .
    OUTPUT:
    
Patchy right basilar opacity , probably in the right lower lobe for which clinical correlation is suggested . Early pneumonia would be a differential consideration , although atelectasis , scarring or airway inflammation could be considered .