Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views were obtained with patient in upright position . Comparison is made with the next preceding portable chest examination obtained 10 hours earlier during the same day . Heart size is unchanged and remains normal . Thoracic aorta unremarkable . No mediastinal abnormalities are present . Several linear densities on the left base and mild blunting of the pleural lateral sinus is present as before and coincides with the previously described local chest wall emphysema related to stab wounds and surgical repair . The amount of chest wall emphysema present reaches up to the axillary area and appears to be stable in comparison with the next previous portable chest examination . As before , some local strands of chest wall emphysema are overlying the apical area , but there is no conclusive evidence for any apical pneumothorax . Thus , both lungs remain well aerated .
    OUTPUT:
    
Local stab wounds with small atelectasis on left base but no evidence of massive infiltrates , large pleural effusion or apical pneumothorax .