Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left - sided PICC sits in the superior right atrium . The cardiomediastinal and hilar contours appear normal . The lungs are clear . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
1 . No evidence of pneumonia . 2 . Left PICC tip in superior right atrium ; if ectopy in an issue , retraction by 3 cm may be considered .