Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size , mediastinal and hilar contours are within normal limits . Lungs are clear except for minimal left retrocardiac opacity , possibly due to localized scarring in this patient with previous left lower lobe pneumonias . Appearance is currently similar to a post - treatment of ___ , and improved since ___ radiograph . Remainder of lungs are clear , and there are no pleural effusions or acute skeletal findings . Splenomegaly is noted in the upper abdomen .
    OUTPUT:
    
1 . Nonspecific left retrocardiac opacity , possibly due to localized scarring from previous pneumonias , but short - term followup radiograph may be helpful to exclude a recurrent active infection in this region . 2 . Splenomegaly , in keeping with history of CLL .