Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . The lungs are clear without focal consolidation , pleural effusion , or pneumothorax . Heart size is normal . Mediastinal silhouette and hilar contours are normal . The nodular opacity seen on the prior shoulder radiograph is likely due to hypertrophy and sclerosis at the left 1st rib costochondral junction . Gynecomastia is again noted .
    OUTPUT:
    
No concerning opacity in the left apex .