Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated with an increased AP diameter . A left upper lobe nodule is again seen and is probably stable from previous studies . Additionally , there is heterogeneous opacification along the right heart border likely consistent with right middle lobe pneumonia . Previous increased interstitial lung markings of the lower lung bases have improved since ___ study . There is tracheal displacement secondary to a left thyroid mass which is stable since ___ . No pleural effusion , pulmonary edema , or pneumothorax is seen .
    OUTPUT:
    
Right middle lobe pneumonia . Stable left upper lobe nodule and tracheal deviation secondary to left thyroid mass .