Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a very faint curvilinear lucency identified on the frontal view overlying the left posterior seventh rib . This may correspond with the area of pneumomediastinum identified on the concurrent chest CT . No focal consolidation , pleural effusion , or pneumothorax identified . Heart size is normal .
    OUTPUT:
    
Very faint curvilinear lucency on the frontal view , overlying the left posterior seventh rib , may correspond with the area of pneumomediastinum identified on the concurrent chest CT .