Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild interstitial edema . Slight asymmetry at the level of the first costochondral junction on the left . No focal consolidation to suggest pneumonia . No pleural effusion or pneumothorax . The cardiomediastinal silhouette is normal . The hila and pleura are unremarkable . There is no acute osseous abnormality .
    OUTPUT:
    
1 . Mild interstitial edema . 2 . Slight dense asymmetry at the level of the first costochondral junction on the left which may represent degenerative joint changes , a lung parenchyma abnormality is less likely . Further evaluation to localize the asymmetry could be obtained by performing a chest x-ray with apical lordotic view .