Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . The lungs are clear of consolidation . There is , however , suggestion of a left - sided pneumothorax with pleural reflection seen somewhat paralleling the left posterior fourth rib . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormality is identified .
    OUTPUT:
    
Probable small left pneumothorax which can be further confirmed with expiratory chest x-ray . Findings discussed with Dr . ___ by Dr . ___ at 8 pm over the phone one minute after time of discovery .