Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right - sided subclavian Port - A - Cath is in - situ , the tip is at the cavoatrial junction . The cardiomediastinal contour is unchanged compared to the prior study . There is stable mild cardiomegaly . There is new right basal airspace opacity with partial silhouetting of the right heart border . No other areas concerning for infection are seen . No pleural effusion or pneumothorax . Curvilinear calcification adjacent to the left humeral head .
    OUTPUT:
    
New right basal airspace opacity likely reflecting right middle lobe pneumonia .