Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Stable lingular opacities partially obscuring the left heart border , with mild associated volume loss . Slightly increased bronchiolar opacities in the right middle lobe , with a distribution similar to prior CT . No pleural effusions . Heart size is normal . Mild bilateral acromioclavicular and glenohumeral arthropathy .
    OUTPUT:
    
Stable lingular and increased right middle lobe opacities , likely due to atypical mycobacterial infection .