Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrates subtle increased reticulonodular markings at the lower lungs bilaterally which may reflect an atypical pneumonia . Cardiomediastinal and hilar contours are unremarkable . No pleural effusion or pneumothorax is identified . Osseous structures demonstrates no acute abnormality . Gas filled loops of nondistended bowel incidentally noted .
    OUTPUT:
    
Subtle increased reticulonodular markings at the lower lungs bilaterally which may reflect an atypical pneumonia .